Created on April 24th, 2026 at 01:18 am
Table of Contents
Introduction to Key Lime Cake Pie
If you love the refreshing zing of citrus desserts, you’re in for a treat with our Zesty Key Lime Cake Pie. This delightful creation merges the creamy texture of a pie with the light, fluffy layers of a cake, offering a unique twist on traditional Key Lime Pie. Perfect for any occasion, this dessert is sure to impress both family and friends.
The Inspiration Behind the Recipe
The idea for this Key Lime Cake Pie was born from a desire to combine the best elements of classic desserts. While a traditional key lime pie offers a smooth, tangy filling, we wanted to incorporate the airy quality of a cake. The result is a dessert that offers a perfect balance of tartness and sweetness with every bite. For more inspiration, check out Key Lime Tart.
Why You’ll Love This Dessert
This Key Lime Cake Pie is a must-try for anyone who enjoys citrus flavors. The combination of a soft cake with a tangy lime filling creates a harmonious blend that is both refreshing and satisfying. Plus, the inclusion of our special key lime frosting adds an extra layer of flavor that makes this dessert truly unforgettable.

Ingredients for Key Lime Cake Pie
Essential Ingredients
Creating this cake pie requires a handful of staple ingredients you likely already have in your kitchen. Flour, sugar, butter, and of course, fresh key limes are essential to achieving the perfect balance of flavors. Each ingredient plays a crucial role in ensuring the final result is moist, flavorful, and delightfully citrusy.
Optional Add-ins and Variations
While the basic recipe is delicious on its own, there are several ways you can customize it to your liking. Consider adding shredded coconut for a tropical twist or even a dash of vanilla extract to enhance the overall flavor profile. Whatever your preference, this recipe is versatile enough to accommodate various add-ins and variations.
Step-by-Step Preparation
Preparing the Cake Base
To begin, prepare your cake base by creaming together softened butter and sugar until light and fluffy. Gradually add eggs and mix until fully incorporated. In a separate bowl, combine your dry ingredients, then add them to the wet mixture alternately with milk, ensuring a smooth batter. Pour the batter into a greased 9-inch round cake pan.
Making the Key Lime Filling
For the filling, combine sweetened condensed milk, egg yolks, and key lime juice. Whisk these ingredients together until you achieve a creamy consistency. Pour this mixture over the prepared cake base, spreading it evenly to cover the surface.
Assembling the Cake Pie
Once your base and filling are ready, layer them in your cake pan. The cake batter will rise around the lime filling as it bakes, creating a marbled effect. Bake in a preheated oven at 350°F for about 50 minutes, or until a toothpick inserted in the center comes out clean. Allow the cake pie to cool completely before frosting.
Baking and Serving Tips
Optimal Baking Time and Temperature
Baking at the right temperature and for the correct amount of time is crucial to achieving the perfect texture. Ensure your oven is preheated to 350°F and check the cake regularly after 45 minutes. The top should be golden brown, and the center should be set but not overly firm.
Serving Suggestions
For an elegant presentation, serve your Key Lime Cake Pie with a dollop of whipped cream and a thin slice of fresh lime on top. This not only enhances the visual appeal but also adds a touch of freshness that complements the dessert’s rich flavors.

Pro Tips
To ensure your Key Lime Cake Pie turns out perfectly each time, follow these expert tips.
- Use fresh key limes for the best flavor, as bottled juice can’t compare to the natural zing of fresh citrus.
- For a more intense lime flavor, add a teaspoon of lime zest to the batter.
- Let the cake cool completely before applying the frosting to prevent it from melting and sliding off.
- For a professional finish, consider using a piping bag to apply the frosting evenly.
Remember, the key to a successful Key Lime Cake Pie is patience. Allowing it to cool completely ensures that the flavors meld together beautifully, offering a more cohesive taste and texture.
Storing and Reheating
Best Practices for Storage
To keep your Key Lime Cake Pie fresh, store it in an airtight container in the refrigerator for up to five days. This helps maintain the cake’s moisture and prevents the lime filling from becoming too soft.
Reheating for Best Results
Although this dessert is best enjoyed cold, if you prefer it warm, reheating individual slices in the microwave for 10-15 seconds can enhance its flavors. Be sure not to overheat, as this can cause the frosting to melt.
Pairing Suggestions
Beverage Pairings
A citrusy dessert like this pairs beautifully with a refreshing beverage. Consider serving it with a chilled Lime And Coconut Drink to complement the cake’s tropical notes.
Complementary Desserts
If you’re planning a dessert spread, pair your Key Lime Cake Pie with other citrus-based treats like Lemon Cake Bars. Their zesty flavors will harmonize beautifully, creating a well-rounded selection for citrus lovers.

Zesty Key Lime Cake Pie
Equipment
- 1 9-inch round cake pan greased and floured
- 1 electric mixer
- 1 Mixing Bowl large
Ingredients
Dry Ingredients
- 2 cups all-purpose flour
- 1 tsp baking powder
- 1/2 tsp baking soda
- 1/4 tsp salt
Wet Ingredients
- 1/2 cup unsalted butter softened
- 1 cup granulated sugar
- 2 large eggs room temperature
- 1/2 cup whole milk
- 1/4 cup fresh key lime juice
- 1 tsp vanilla extract
Key Lime Filling
- 14 oz sweetened condensed milk
- 3 egg yolks
- 1/3 cup fresh key lime juice
Key Lime Frosting
- 1/2 cup unsalted butter softened
- 3 cups powdered sugar
- 2 tbsp fresh key lime juice
- 1/2 tsp lime zest
Instructions
Preparation
- Preheat your oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.
- In a large mixing bowl, cream together the butter and sugar until light and fluffy. Add the eggs one at a time, beating well after each addition. Mix in the vanilla extract.
- In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients alternately with the milk, starting and ending with the dry ingredients. Mix just until combined.
- In a medium bowl, whisk together the sweetened condensed milk, egg yolks, and key lime juice until smooth and creamy.
- Pour half the cake batter into the prepared pan. Slowly pour the lime filling over the batter, then cover with the remaining batter.
- Bake in the preheated oven for 45-50 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool completely in the pan on a wire rack.
- In a mixing bowl, beat the butter until creamy. Gradually add the powdered sugar, lime juice, and lime zest, beating until smooth and fluffy.
- Once the cake is completely cool, spread the frosting evenly over the top. Decorate with additional lime zest if desired.
- Slice the cake pie into 8 servings and enjoy as a refreshing dessert.
- Store leftovers in an airtight container in the refrigerator for up to 5 days.
Notes
FAQ
Can I use regular limes instead of key limes?
Yes, you can use regular limes if key limes are not available. While key limes have a distinct flavor that brings a unique tartness to the dessert, regular Persian limes can serve as a suitable substitute. Simply use the same amount of juice from regular limes as you would from key limes. The flavor will be slightly different but still delicious.
How can I make the cake pie more festive for a celebration?
To make your Key Lime Cake Pie more festive, consider adding some colorful decorations. You can incorporate edible flowers, fresh fruit, or even a sprinkle of colored sugar on top of the frosting. Additionally, using a decorative piping tip to frost the cake can elevate its presentation. Adding a few candles or a personalized cake topper can also make it suitable for birthdays or special occasions.



