Key Lime Pound Cake

There’s something undeniably special about a Key Lime Pound Cake. The perfect balance of rich buttery texture and zesty citrus flavor makes it a delightful dessert for any occasion. Whether you’re baking for a summer gathering, a holiday treat, or simply craving something indulgent, this cake never fails to impress.

Unlike traditional pound cake, which is known for its dense, buttery consistency, the addition of Key lime juice and zest infuses this recipe with a bright, tangy flavor. It’s the kind of dessert that satisfies both lovers of rich cakes and those who prefer a touch of refreshing citrus.

But what exactly makes Key lime so unique? Unlike regular Persian limes, Key limes are smaller, more aromatic, and slightly sweeter, giving them a distinct flavor that enhances desserts beautifully. Their natural acidity balances out the sweetness of the cake, making each bite irresistibly delicious.

If you love pound cakes and want to add a zesty twist, this recipe will quickly become your new favorite. Let’s dive into the history of this classic cake and why Key lime is the perfect addition.

The History and Cultural Significance of Pound Cake

Pound cake has a long history dating back to the 18th century, originating in Europe. The name comes from its traditional recipe, which called for a pound each of flour, sugar, butter, and eggs. This simple, balanced formula resulted in a dense yet tender cake that could last for days without refrigeration.

Over time, the recipe evolved, with bakers experimenting by adding ingredients like vanilla, citrus, and leavening agents. In the Southern United States, pound cake became a staple at family gatherings and celebrations, often paired with fresh fruit or glaze to enhance its flavor.

The introduction of Key lime into pound cake is a more recent adaptation, inspired by the famous Key lime pie from Florida. The combination of tart citrus and buttery cake creates a perfect harmony of flavors, making it a beloved variation of the classic dessert.

Today, Key Lime Pound Cake is cherished for its refreshing taste and nostalgic comfort. It’s a cake that bridges tradition with innovation, bringing a tropical flair to a timeless classic.

Preparation Phase & Tools to Use

Before starting, it’s essential to have the right tools and ingredients ready. Proper preparation ensures a smooth baking process and helps achieve the best results.

Essential Tools and Equipment

To make this Key Lime Pound Cake, you’ll need the following:

• Mixing bowls – For combining wet and dry ingredients separately.
• Electric mixer (hand or stand mixer) – To cream butter, sugar, and shortening properly.
• Measuring cups and spoons – Precision is key in baking.
• Sifter – Helps aerate flour and prevent lumps.
• 10-inch tube pan – Provides even baking and a beautiful shape.
• Wire cooling rack – Allows airflow for even cooling.
• Zester and juicer – Extracts fresh lime zest and juice efficiently.

The Importance of Each Tool

• Sifting flour – Ensures a light and even cake texture.
• Using a tube pan – Helps distribute heat evenly, preventing underbaked or dense areas.
• Wire cooling rack – Allows steam to escape, preventing sogginess.
• Zesting limes – Enhances flavor without bitterness from the pith.

Recipe Details: Ingredients 

• Prep Time: 20 minutes
• Cook Time: 1 hour 30 minutes
• Cooling Time: 45 minutes
• Total Time: 2 hours 35 minutes
• Servings: 12-16 slices

Ingredients

For the Cake

• 3 cups white sugar
• 1 cup unsalted butter, softened
• ½ cup shortening
• 3 cups cake flour, sifted
• ½ teaspoon baking powder
• ⅛ teaspoon salt
• 6 large eggs
• 1 cup heavy cream
• ¼ cup Key lime juice (freshly squeezed)
• 1 teaspoon lime zest
• 1 teaspoon vanilla extract

For the Glaze

• 1 cup powdered sugar
• 2 tablespoons Key lime juice
• ½ teaspoon vanilla extract

Step-by-Step Instructions

Mixing the Cake Batter

1. Preheat the oven to 300°F (150°C).
2. Prepare the pan by greasing and flouring a 10-inch tube pan and lining it with parchment paper.
3. Cream together sugar, butter, and shortening in a large mixing bowl until light and fluffy. This step ensures a tender cake texture.
4. Sift the dry ingredients—cake flour, baking powder, and salt—into a separate bowl.
5. Alternate additions: Gradually add the flour mixture and eggs to the creamed butter mixture, beginning and ending with the flour. This helps maintain a smooth, even batter.
6. Incorporate liquids: Stir in Key lime juice, lime zest, and vanilla extract until fully combined. Be careful not to overmix.

Baking the Cake

7. Pour the batter evenly into the prepared pan, spreading it out with a spatula.
8. Bake in the preheated oven for about 1 hour 30 minutes, or until a toothpick inserted into the center comes out clean.
9. Cool the cake in the pan on a wire rack for 15 minutes before carefully removing it to cool completely.

Making the Key Lime Glaze

10. Whisk together powdered sugar, Key lime juice, and vanilla extract in a small bowl until smooth.
11. Brush or drizzle the glaze over the cooled cake, allowing it to soak in for added flavor.

Expert Baking Tips

• Use fresh Key limes whenever possible for authentic flavor.
• Sift the flour to prevent a dense texture.
• Do not overmix once the flour is added to avoid a tough cake.
• Let the cake cool completely before adding the glaze to prevent it from melting off.
• Store the cake properly by wrapping it in plastic wrap to keep it moist for several days.

Perfect Side Dish Pairings

While Key Lime Pound Cake is a showstopper on its own, pairing it with complementary sides can take your dessert experience to another level. The rich, buttery cake is balanced beautifully with light, fresh, and creamy accompaniments.

Fresh Fruit Salad

A bright and colorful fruit salad pairs wonderfully with the tangy citrus notes of the cake. The natural sweetness of strawberries, blueberries, mango, and pineapple enhances the flavors while providing a refreshing contrast to the dense texture of the cake.

Whipped Cream & Berries

A simple dollop of whipped cream with fresh raspberries or blackberries adds a creamy texture and slight tartness that balances the cake’s richness. For an extra twist, add a bit of vanilla extract or lime zest to the whipped cream.

Vanilla or Coconut Ice Cream

A scoop of vanilla ice cream is always a classic pairing, but coconut ice cream enhances the tropical vibes of Key Lime Pound Cake. The cold, creamy texture contrasts beautifully with the warm, buttery cake.

Lemon Curd or Lime Drizzle

For those who love extra citrus flavor, a spoonful of lemon curd or a light lime drizzle over the cake adds a tart, creamy layer. The added acidity enhances the Key lime flavor and keeps each bite fresh and vibrant.

Toasted Coconut Flakes

Sprinkling toasted coconut flakes on top of a cake slice adds a slight crunch and tropical sweetness. Toasting the coconut deepens its flavor, making it a great companion to the citrusy cake.

Iced Tea or Key Lime Cocktails

A refreshing drink pairing can elevate the dessert experience. Sweet tea, citrus-infused water, or a Key lime mojito complement the tangy flavors of the cake without overpowering it.

Honey-Sweetened Yogurt

A bowl of Greek yogurt sweetened with honey and topped with a sprinkle of granola creates a delightful contrast in texture and flavor. The tanginess of the yogurt echoes the citrus notes in the cake, making it a light yet satisfying addition.

Dark Chocolate Sauce

For chocolate lovers, a drizzle of dark chocolate sauce adds a rich, slightly bitter contrast to the bright, tangy cake. Dark chocolate pairs well with citrus and enhances the cake’s depth of flavor.

Nutritional Information & Health Benefits

While Key Lime Pound Cake is an indulgent treat, understanding its nutritional breakdown can help balance portion sizes and pairings.

Calories & Macronutrients

Each slice of pound cake is calorie-dense, thanks to the butter, sugar, and cream. The ingredients provide a satisfying richness but should be enjoyed in moderation.

• Carbohydrates: The primary source of energy in this cake comes from sugar and flour.
• Fats: Butter and shortening provide a rich texture while contributing to satiety.
• Protein: Eggs add a moderate amount of protein, helping with structure and texture.
• Vitamin C: Key lime juice and zest contribute a small amount of vitamin C, beneficial for immune support.

Healthier Modifications

If you want to enjoy Key Lime Pound Cake while reducing calories or carbs, here are some simple modifications:

• Reduce the sugar: Decrease sugar by ¼ cup without compromising sweetness.
• Substitute part of the butter: Use Greek yogurt for some of the butter to lower fat content.
• Use whole wheat pastry flour: Adds fiber while maintaining a light texture.
• Opt for a natural sweetener: Replace sugar with honey or coconut sugar for a more natural alternative.

Common Mistakes to Avoid

Baking Key Lime Pound Cake requires precision and attention to detail. Avoiding these common mistakes will ensure the best results every time.

Mixing Mistakes

• Overmixing the Batter: Overmixing flour can lead to a dense and tough cake. Once you add flour, mix just until incorporated.
• Skipping the Sifting Step: Sifting the flour and baking powder ensures a light, even crumb. Skipping this step can result in clumps and uneven baking.

Baking Mistakes

• Not Preheating the Oven Properly: The right temperature is crucial for even baking. An oven that is too hot can cause the cake to bake unevenly, while a cool oven can make the cake dense.
• Underbaking or Overbaking: Test for doneness by inserting a toothpick into the center of the cake. If it comes out clean, the cake is ready. Overbaking can dry out the cake, while underbaking leaves it too moist in the center.

Ingredient Substitution Errors

• Using Regular Limes Instead of Key Limes: While Persian limes work in a pinch, Key limes have a more aromatic and slightly sweeter taste. Regular limes can alter the cake’s authentic flavor.
• Swapping Heavy Cream for Milk: Heavy cream adds richness to the texture. If you use milk, the cake may turn out less moist and flavorful.

Glazing Errors

• Applying the Glaze While the Cake is Too Hot: This will cause the glaze to melt and run off instead of being absorbed into the cake. Let the cake cool completely before glazing.
• Not Poking Holes Before Glazing: Small holes help the glaze soak into the cake for maximum flavor.

Storage & Serving Mistakes

• Not Wrapping the Cake Properly: Exposure to air can dry out the cake. Always store it in an airtight container or wrap it tightly in plastic wrap.
• Serving Too Soon: Let the cake rest for a few hours or overnight for the best flavor development. Freshly baked pound cake tastes great, but allowing it to sit enhances its taste and texture.

How to Perfect Your Key Lime Pound Cake Every Time

Use Fresh Key Lime Juice & Zest

Bottled lime juice lacks the freshness and depth of real Key lime juice. Always use freshly squeezed juice for the best flavor.

Measure Ingredients Accurately

Baking is a science, and precise measurements are crucial. Use a kitchen scale for the most accurate results.

Grease & Flour the Pan Properly

Pound cakes have a dense texture, making them more likely to stick to the pan. Thoroughly greasing and flouring the pan ensures easy removal.

Cool the Cake Before Slicing

Allowing the cake to cool completely before slicing helps maintain its structure and keeps it from crumbling.

Adjust for Humidity & Altitude

If you live in a humid or high-altitude area, slight adjustments may be necessary. Reducing the amount of liquid or increasing the baking time may help achieve the perfect consistency.

Expert Baking Tips & Notes

Mastering Key Lime Pound Cake requires a few insider tips. These simple adjustments can make all the difference in achieving a moist, flavorful cake with the perfect texture.

Use High-Quality Ingredients

• Fresh Key limes yield the best flavor. Bottled lime juice lacks the same brightness and intensity.
• Real butter adds richness that margarine or substitutes can’t match.
• Cake flour creates a more tender crumb than all-purpose flour.

Let Ingredients Reach Room Temperature

• Cold butter won’t cream properly, affecting the cake’s texture.
• Eggs blend better when not chilled, resulting in a smoother batter.

Avoid Overmixing Once Flour Is Added

• Overworking the batter activates too much gluten, making the cake dense and chewy instead of soft.

Test for Doneness Correctly

• Check by inserting a toothpick into the center—if it comes out clean, the cake is ready.
• If it’s slightly moist, give it another few minutes and test again.

Let the Cake Cool Completely Before Glazing

• Glazing too early will cause the topping to melt instead of soaking into the cake.

Rest the Cake Overnight for Best Flavor

• The citrus flavor deepens with time, making the cake even more delicious the next day.

How to Store & Keep Key Lime Pound Cake Fresh

Proper storage ensures the cake stays moist and flavorful for as long as possible.

Room Temperature Storage

• Wrap the cake tightly in plastic wrap or store in an airtight container.
• Keep at room temperature for up to 5 days.
• If sliced, cover the cut sections with additional plastic wrap to prevent drying.

Refrigeration

• If storing for more than a few days, place the cake in the fridge.
• Wrap it well to prevent it from absorbing fridge odors.
• Allow the cake to come to room temperature before serving, as refrigeration can make it slightly firmer.

Freezing for Long-Term Storage

• Wrap individual slices or the whole cake in plastic wrap, followed by aluminum foil.
• Store in a freezer-safe bag for up to 3 months.
• To serve, thaw at room temperature for a few hours or overnight in the fridge.

How to Reheat for Freshness

• Warm a slice in the microwave for 10-15 seconds for a just-baked taste.
• If reheating a whole cake, wrap it in foil and place in a 300°F oven for 10-15 minutes.

Frequently Asked Questions (FAQs)

Can I use regular limes instead of Key limes?

Yes, but the flavor will be slightly different. Key limes are more aromatic and slightly sweeter than Persian limes. If substituting, add a little extra zest to boost the citrus flavor.

Why did my pound cake turn out dry?

A dry cake is often caused by overbaking or adding too much flour. Use the spoon-and-level method to measure flour properly and check for doneness a few minutes before the recommended baking time.

Can I substitute the shortening with more butter?

Yes, but shortening helps create a fluffier texture. Using only butter may result in a slightly denser cake.

How do I make this cake gluten-free?

Replace cake flour with a 1:1 gluten-free baking blend that contains xanthan gum for structure. The texture may be slightly different but still delicious.

What’s the best way to zest Key limes?

Use a microplane grater and avoid the bitter white pith. Zest only the green outer layer for the best flavor.

Can I add nuts or coconut to this cake?

Absolutely! Chopped pecans or shredded coconut make great additions, adding texture and a slight crunch. Fold them into the batter before baking.

How do I prevent the cake from sticking to the pan?

• Thoroughly grease and flour the pan before pouring in the batter.
• You can also use parchment paper on the bottom for extra insurance.

Can I turn this into cupcakes or a loaf cake?

Yes! Adjust the baking time accordingly:

• Cupcakes: Bake at 325°F for 25-30 minutes.
• Loaf Cake: Bake at 325°F for about 50-60 minutes.

Does this cake need to be refrigerated?

Not necessarily. It stays fresh at room temperature for up to 5 days if properly wrapped. If your kitchen is very warm, refrigerating may help preserve it longer.

Final Thoughts

Key Lime Pound Cake is a beautiful fusion of buttery richness and bright citrusy notes. Whether you’re making it for a family gathering, a holiday treat, or just to satisfy your sweet tooth, this cake is guaranteed to impress.

With its moist crumb, tangy glaze, and perfect balance of flavors, it’s a dessert that feels both indulgent and refreshing. Best of all, it’s easy to customize—whether you add coconut, pair it with whipped cream, or drizzle it with chocolate.

By following the expert tips, avoiding common mistakes, and storing it properly, you’ll enjoy a perfect Key Lime Pound Cake every time. Try it once, and it’s sure to become a favorite in your baking rotation.

Are you ready to bake the ultimate Key Lime Pound Cake? Gather your ingredients, preheat the oven, and enjoy the process—because the results will be absolutely delicious!

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