Why This Key Lime Pound Cake Will Be Your New Favorite

• Unmatched Flavor Profile: This pound cake isn’t just “lime-flavored”; it’s a true celebration of Key limes. With fresh Key lime juice, a delightful Key lime simple syrup drizzled over the warm cake, and a tangy cream cheese glaze infused with even more Key lime, every element works in harmony to deliver an intense, vibrant citrus punch that is simply irresistible.
• Melt-in-Your-Mouth Texture: Thanks to the inclusion of cream cheese and high-quality ingredients, the cake boasts an ultra-soft, velvety, and incredibly moist crumb. It literally melts in your mouth, providing a luxurious experience that sets it apart from ordinary pound cakes.
• The Perfect Make-Ahead Dessert: One of the best qualities of this Key Lime Pound Cake is that its flavors deepen and its moisture improves with time. It tastes even better the next day, making it an ideal dessert to prepare in advance for parties, potlucks, or simply to enjoy throughout the week. This convenience allows you to focus on enjoying your time without last-minute stress.
• Bright and Refreshing: The lively citrus notes make this pound cake a perfect dessert for spring and summer gatherings. Its bright flavor is a welcome contrast to heavier desserts, leaving a refreshing taste that invigorates the palate.
• Visually Stunning: With its golden hue, elegant bundt shape, and a generous cascade of creamy white glaze finished with fresh lime zest, this cake is as beautiful to behold as it is delicious to eat. It makes a show-stopping centerpiece for any dessert table.

Essential Ingredients for the Perfect Key Lime Pound Cake

Creating an exceptional Key Lime Pound Cake begins with selecting the right ingredients. Here’s a closer look at what makes this recipe truly special:

• Fresh Key Limes: These small, intensely aromatic citrus fruits are distinct from their larger Persian counterparts found in most grocery stores. Originating largely from South Florida, Key limes deliver a unique sour, tangy punch, often with subtle bitter and floral undertones. When paired with the richness of a pound cake, they create an exquisite flavor harmony. We utilize both the zest and juice to infuse every layer of the cake with this authentic, tart essence. The zest carries potent oils, providing a concentrated burst of flavor, while the juice adds that essential tangy moisture.
• Cream Cheese: A cornerstone of this recipe, cream cheese is responsible for the incredibly moist and tender crumb of this bundt cake. Its natural tang works in conjunction with a touch of sour cream to amplify and complement the bright Key lime flavor, adding depth and complexity to the overall taste profile. It also contributes to the cake’s luxurious density, characteristic of a true pound cake.
• Salted Butter: While some bakers opt for unsalted butter, salted butter is my preferred choice for its ability to enhance the cake’s flavor. The salt subtly balances the sweetness and brings out the vibrant citrus notes, while also contributing to the rich, velvety texture that defines a perfect pound cake. Ensure your butter is at room temperature for optimal creaming.
• Cake Flour: The secret to an exquisitely tender cake! Cake flour has a lower protein content compared to all-purpose flour, which results in less gluten development. This characteristic gives the pound cake a finer, softer crumb that literally melts in your mouth. If you desire that signature delicate texture, cake flour is an indispensable ingredient.
• Baking Powder: Unlike traditional, denser pound cakes, a small amount of baking powder is included in this recipe. This provides a subtle lift, preventing the cake from becoming overly dense and ensuring a delicate balance between a light, fluffy texture and the classic substantial mouthfeel of a pound cake. This technique is also employed in my Corn Pound Cake for a similarly delightful texture.
• Eggs (Room Temperature): Eggs bind the ingredients, add richness, and contribute to the cake’s structure. Using them at room temperature is crucial as they emulsify more effectively with the butter and sugar, resulting in a smoother, more uniform batter and a lighter, fluffier cake.
• Whole Milk (Room Temperature): Adds moisture and richness to the batter. Like eggs, using whole milk at room temperature helps it integrate seamlessly into the batter, preventing curdling and ensuring a consistent texture.
• Vanilla Extract: A splash of good quality vanilla extract always enhances the overall flavor profile of baked goods, adding warmth and depth that beautifully complements the bright citrus.

Smart Substitutions for Your Key Lime Pound Cake

While the recipe calls for specific ingredients to achieve the best results, sometimes substitutions are necessary. Here are some reliable alternatives that will still yield a delicious cake:

• Key Limes: If fresh Key limes are unavailable or out of season, you have a couple of excellent alternatives.
  • Bottled Key Lime Juice: While fresh is always preferred for its vibrant complexity, high-quality bottled Key lime juice can be used. It will still impart a good citrus flavor, making it a convenient option.
  • Regular Limes (Persian Limes): Standard green limes found in most grocery stores are a fantastic substitute. Their flavor profile is slightly different—less tart and floral than Key limes—but they will still provide a wonderful, bright citrus essence that works beautifully in this pound cake. Simply use their zest and juice as directed.
• Butter: My recipe specifies salted butter for its flavor-enhancing qualities, but if you prefer, you can certainly use unsalted butter. If you go this route, consider adding an extra pinch (about 1/4 teaspoon) of fine salt to your dry ingredients to help balance the sweetness and bring out the flavors. Baking is all about customizing to your taste, so feel free to adjust this Key lime cake recipe to your liking!
• Glaze: The creamy, tangy Key lime cream cheese glaze is a highlight of this cake, but if you’re looking for a quicker or simpler option:
  • Simple Key Lime Glaze: Combine 1 ½ cups of powdered sugar with 2-4 tablespoons of Key lime juice (or regular lime juice) until smooth. This creates a thinner, yet equally zesty, glaze that will add a beautiful sheen and burst of citrus flavor.
  • No Glaze: For a less sweet option, you can even skip the glaze entirely and just enjoy the cake with the Key lime simple syrup.
• Sour Cream: If you don’t have sour cream on hand, full-fat plain Greek yogurt can be a good substitute. It will provide a similar tang and moisture to the cake.
• Vegetable Oil: Any neutral-flavored oil like canola oil or grapeseed oil can be used interchangeably with vegetable oil.

How to Bake the Best Key Lime Pound Cake

Follow these detailed steps to create a truly spectacular Key Lime Pound Cake:

Preparation is Key

Step 1: Get Ready to Bake! Preheat your oven to 325 degrees F (160 degrees C). This lower temperature allows the pound cake to bake evenly and slowly, preventing a dry exterior and ensuring a perfectly moist interior. Generously coat a 12 or 15-cup bundt pan with nonstick baking spray, ensuring every crevice is covered. This is crucial for easy release later. Set the prepared pan aside.

Step 2: Infuse the Sugar. In the bowl of your stand mixer, combine the granulated sugar and fresh Key lime zest. If you’re using regular limes, use their zest here. Using your fingertips, pinch and rub the zest into the sugar. This releases the aromatic oils from the zest, infusing the sugar with intense lime flavor and fragrance, a technique known as “zest-infused sugar.” Next, juice your fresh Key limes into a measuring cup and set it aside. If using bottled Key lime juice, simply measure it out.

Step 3: Cream the Fats. Add room temperature butter, cream cheese, and vegetable oil to the stand mixer bowl with the zest-infused sugar. Attach the paddle attachment and beat on medium speed for a full 7-8 minutes. This extended creaming time is essential for incorporating air into the mixture, which contributes to the cake’s light texture and high rise. Halfway through, be sure to stop and scrape down the sides of the bowl to ensure all ingredients are thoroughly combined. Reduce the mixer speed to low and add the eggs one at a time, ensuring each egg is fully incorporated into the batter before adding the next. This prevents the batter from separating and maintains a smooth emulsion.

Step 4: Combine Wet and Dry. In a separate medium bowl, whisk together the cake flour, kosher salt, and baking powder. In another small bowl, combine the whole milk, Key lime juice, vanilla extract, and sour cream. Whisk these wet ingredients until well combined. With the mixer on low, gradually add half of the dry ingredients to the creamed mixture, mixing until just smooth. Then, pour in all of the Key lime juice mixture. Finally, add the remaining flour mixture. Mix until just combined, being careful not to overmix, which can lead to a tough cake. Scrape down the sides of the bowl one last time and mix for an additional 10 seconds to ensure the batter is smooth and uniformly mixed.

Bake to Perfection, Then Frost with Zing

Step 5: Bake the Cake. Carefully pour the prepared batter into your greased bundt pan, smoothing the top with a spatula if necessary. Bake for 1 hour and 15 to 20 minutes. Baking times can vary slightly depending on your oven, so always rely on the “skewer test.” The cake is done when a wooden skewer or toothpick inserted into the center comes out with just a few moist crumbs attached, indicating a perfectly baked and tender crumb. While the cake bakes, seize the opportunity to prepare the flavorful Key lime simple syrup. In a small saucepan over medium heat, combine 1/3 cup water and 1/3 cup sugar. Stir continuously until the sugar completely dissolves and the mixture comes to a gentle boil, which usually takes about 5 minutes. Remove the saucepan from the heat and stir in 2 tablespoons of Key lime juice. Set this vibrant syrup aside to cool slightly.

Step 6: Syrup and Glaze. Once the cake is baked, remove it from the oven and allow it to cool in the bundt pan for exactly 10 minutes. This crucial cooling period helps the cake firm up slightly before you attempt to invert it. After 10 minutes, carefully invert the cake onto a wire rack. While the cake is still warm, use a pastry brush to generously coat the entire surface of the cake with the prepared Key lime simple syrup. The warm cake will readily absorb the syrup, adding extra moisture and an intense burst of lime flavor. Allow the cake to cool completely on the wire rack before proceeding to the next step. This can take an hour or more, depending on your kitchen’s temperature. Once the cake is fully cooled, it’s time to make the glorious Key lime cream cheese glaze. In a medium bowl, combine room temperature cream cheese and powdered sugar. Using an electric hand mixer, beat them together until smooth and well combined, about 30 seconds to 1 minute. Next, add the melted butter, Key lime juice, and vanilla extract. Mix on low speed until just combined, ensuring a creamy, pourable consistency. Pour this luscious glaze generously over the cooled cake, allowing it to drip attractively down the sides. For a final flourish, garnish with additional fresh Key lime zest before serving. Enjoy!

Expert Tips for a Flawless Key Lime Pound Cake

Achieving pound cake perfection is within reach with these expert tips:

• Zest Before You Juice! This is a golden rule in citrus baking that I sometimes forget in my excitement! Always zest your Key limes (or regular limes) *before* you cut them and begin juicing. It is significantly easier to extract the zest from a firm, whole fruit than from a squeezed, soft one. This ensures you get all those flavorful oils efficiently.
• Room Temperature Ingredients are Non-Negotiable: For the butter, cream cheese, and eggs, ensure they are at true room temperature. This is vital for proper emulsion. Cold ingredients will not cream together smoothly, leading to a lumpy batter and a denser, less uniform cake texture. Pull them out of the refrigerator at least 1-2 hours before you plan to bake.
• Measure by Weight for Best Results: While cup measurements are provided, for the most consistent and professional baking results, I highly recommend using a kitchen scale to measure your dry ingredients, especially flour. Flour can easily be over-measured by volume, leading to a dry and crumbly cake. Measuring by weight (grams) prevents excess flour and ensures you achieve that perfectly tender, moist crumb every time.
• Don’t Overmix the Batter: Once you add the dry ingredients to the wet, mix only until just combined. Overmixing develops gluten, which can make your pound cake tough and chewy instead of tender and soft. A few small lumps are perfectly fine; they’ll bake out.
• Cool Completely Before Glazing: It’s tempting to glaze the cake while it’s still warm, but resist the urge! If the cake is not completely cool, the glaze will melt and simply run off, creating a messy rather than a beautifully adorned cake. Patience is key for that perfect finish.
• Bundt Pan Prep is Crucial: Beyond just spraying, ensure you get into all the nooks and crannies of your bundt pan. For intricate designs, a light dusting of flour after spraying can add an extra layer of non-stick protection, especially for a rich batter like this one.

Frequently Asked Questions About Key Lime Pound Cake

Can I use regular limes instead of Key limes?

Absolutely! If you can’t find fresh Key limes, fresh regular (Persian) limes are an excellent second-best option. My motto is always: fresh is best. Regular limes will still impart a wonderful bright citrus flavor, although it will be slightly less tart and floral than genuine Key limes.

Should I use fresh lime juice or bottled?

For the most vibrant and authentic flavor, fresh lime juice is always recommended. However, if fresh limes are not available, you can certainly use high-quality bottled Key lime juice. The cake will still be delicious, but the fresh zest and juice offer an unparalleled aromatic quality.

How should I store Key Lime Pound Cake, and how long does it last?

You can store the unfrosted cake at room temperature in an airtight container for up to 2 days. To extend its freshness, or if the cake is already glazed with the cream cheese frosting, transfer it to an airtight container and refrigerate for up to 5-7 days. Always bring refrigerated cake to room temperature before serving for the best texture and flavor.

Can I turn this into cupcakes or a layer cake?

Yes, absolutely! This versatile batter can be adapted for cupcakes or a layer cake. The baking temperature (325 degrees F) remains the same, but you will need to significantly adjust the baking times. Cupcakes typically bake for 20-25 minutes, and cake layers usually take 30-40 minutes, depending on the pan size. Always test for doneness with a toothpick.

Can I freeze this pound cake?

Yes, Key Lime Pound Cake freezes beautifully! Allow the pound cake to cool completely before freezing. For best results, do not add the cream cheese glaze prior to freezing. Cut the cake into individual slices or freeze it whole. Wrap the cake tightly in plastic wrap, then an additional layer of aluminum foil, and place it into a freezer-safe bag or container. It can be frozen for up to 3 months. When you’re ready to enjoy, thaw the cake in the refrigerator overnight or at room temperature for a few hours. If you’re freezing leftover slices that are already frosted, follow the same wrapping process, but be aware that the texture of the cream cheese frosting may be slightly altered upon thawing.

Discover More Delicious Pound Cake Recipes

Key Lime Pound Cake Recipe Card

Key Lime Pound Cake

By Britney

Prep: 30 mins

Cook: 1 hr 20 mins

Total: 1 hr 50 mins

Servings: 16

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Key Lime Pound Cake is key lime pie in cake form! A moist cream cheese pound cake bursting with key lime flavor and topped with a zingy key lime glaze.

Equipment

• 12 or 15-cup bundt pan
• Stand Mixer
• Microplane/Zester
• Mixing Bowls
• Pastry Brush

Ingredients

Key Lime Pound Cake

• 2 tbsp Key Lime Zest
• 2 3/4 cups Sugar
• 1 cup Salted Butter, (room temperature)
• 8 oz Cream Cheese, (room temperature)
• 2 tbsp Vegetable Oil, (or any neutral oil)
• 6 large Eggs, (room temperature)
• 1 tsp Vanilla Extract
• 3 1/4 cup Cake Flour
• 1 tsp Kosher Salt
• 1/2 tsp Baking Powder
• 1/4 cup Whole Milk, (room temperature)
• 1/4 cup Key Lime Juice
• 2 tbsp Sour Cream

Key Lime Simple Syrup

• 1/3 cup Water
• 1/3 cup Sugar
• 2 tbsp Key Lime Juice

Key Lime Cream Cheese Glaze

• 4 oz Cream Cheese, (room temperature)
• 2 1/2 cups Powdered Sugar
• 2 tbsp Salted Butter, (melted)
• 2 tbsp Key Lime Juice
• 1/2 tsp Vanilla Extract
• Extra Key Lime Zest, for garnish

Instructions

1. Prep: Begin by juicing your Key limes into a measuring cup and setting aside the fresh juice. If using bottled Key lime juice, simply measure it out.
2. Preheat your oven to 325 degrees F (160 degrees C). Prepare your 12 or 15-cup bundt pan by generously coating it with nonstick baking spray, ensuring all nooks are covered. Set it aside.
3. In the bowl of your stand mixer, combine the granulated sugar and the freshly grated Key lime zest (or regular lime zest). Use your fingertips to rub the zest into the sugar until it becomes fragrant and fully infused.
4. Add the room temperature salted butter, cream cheese, and vegetable oil to the mixer bowl. Using the paddle attachment, cream these ingredients together on medium speed for 7-8 minutes. This long creaming process is crucial for a light and airy cake. Remember to stop and scrape down the sides of the bowl halfway through. Reduce the mixer speed to low and add the eggs one at a time, allowing each egg to fully incorporate into the batter before adding the next. This ensures a smooth, well-emulsified batter.
5. In a separate medium bowl, whisk together the cake flour, kosher salt, and baking powder. In another small bowl, combine the whole milk, Key lime juice, and vanilla extract with the sour cream; whisk until smooth.
6. With the mixer still on low speed, gradually add half of the dry ingredients to the wet batter, mixing until just smooth. Then, pour in all of the Key lime juice mixture, followed by the remainder of the flour mixture. Mix until just combined, being careful not to overmix. Scrape down the sides of the bowl and mix for another 10 seconds to ensure everything is thoroughly incorporated and smooth.
7. Pour the prepared batter evenly into your greased bundt pan. Bake for 1 hour and 15-20 minutes, or until a wooden skewer inserted into the center of the cake comes out with just a few moist crumbs attached.
8. While the cake is baking, prepare the Key lime simple syrup. In a small saucepan over medium heat, combine the water and sugar. Stir constantly until the sugar completely dissolves and the mixture boils, about 5 minutes. Remove from heat and stir in the Key lime juice. Set aside to cool slightly.
9. Once the cake is done, let it cool in the bundt pan for 10 minutes. Then, carefully invert it onto a wire rack. While the cake is still warm, use a pastry brush to generously coat the entire cake with the Key lime simple syrup. Allow the cake to cool completely on the wire rack before glazing.
10. Finally, prepare the Key lime cream cheese glaze. In a medium bowl, combine the room temperature cream cheese and powdered sugar. Using an electric hand mixer, beat until smooth and combined, about 30 seconds to 1 minute. Add the melted butter, Key lime juice, and vanilla extract. Mix until just combined and smooth. Pour this luscious glaze over the completely cooled cake, allowing it to drip attractively down the sides. Garnish with additional fresh Key lime zest for a beautiful finish.

Notes

• Zest the limes prior to juicing! It’s always easier to zest a whole, firm lime than a squeezed one.
• If you can’t find fresh Key limes, regular limes are a good substitute and will still give you a bright citrus flavor. Bottled Key lime juice can also be used.
• For the best results, measure ingredients with a kitchen scale. This ensures accuracy, preventing too much flour or liquid, and contributes to a perfectly tender cake.

Nutrition

Approximate nutritional values per serving:

• Calories: 535kcal
• Carbohydrates: 73g
• Protein: 7g
• Fat: 25g
• Saturated Fat: 14g
• Polyunsaturated Fat: 2g
• Monounsaturated Fat: 6g
• Trans Fat: 1g
• Cholesterol: 127mg
• Sodium: 358mg
• Potassium: 99mg
• Fiber: 1g
• Sugar: 54g
• Vitamin A: 804IU
• Vitamin C: 2mg
• Calcium: 54mg
• Iron: 1mg

Nutrition information is automatically calculated and should only be used as an approximation.