Key Lime Coconut Cake
Indulging in a slice of Key Lime Coconut Cake is like taking a vacation to a sun-soaked beach with each bite bursting with tropical flavors. The combination of zesty lime and rich coconut creates a delightful, moist cake that’s perfect for any occasion. Whether it’s a summer barbecue, a birthday celebration, or just a treat for yourself, this cake is sure to impress. With its vibrant colors and refreshing taste, it’s a dessert that celebrates the essence of sunshine and happiness. Let’s dive into the details of making this exquisite cake.
Why This Key Lime Coconut Cake Stands Out

This Key Lime Coconut Cake is not just another dessert; it’s a celebration of flavors and textures. The tartness of the fresh lime juice perfectly balances the sweetness of the cake and the creaminess of the frosting. The addition of shredded coconut brings a chewy texture and a hint of tropical flair, making every bite a delightful experience. Plus, this recipe is straightforward, allowing even novice bakers to create a stunning cake that looks as good as it tastes.
Your Shopping Guide
When preparing to make your Key Lime Coconut Cake, here’s a detailed shopping list to ensure you have everything you need:
- Large eggs (6) – Essential for structure and moisture in the cake.
- Granulated sugar (1 cup + 3 tablespoons + 1 cup) – Used for sweetening the cake and frosting.
- All-purpose flour (1 cup) – The foundation of your cake.
- Baking powder (1 teaspoon) – Helps the cake rise and become fluffy.
- Freshly squeezed lime juice (1/4 cup + 3 tablespoons) – Provides tartness and enhances the flavor.
- Warm water (3/4 cup) – Helps to create a moist cake batter.
- Cream cheese (8 oz, softened) – Adds richness and creaminess to the frosting.
- Cold sour cream (16 oz, full fat) – Contributes to the moisture and tanginess of the frosting.
- Lime zest (1 tablespoon) – Intensifies the lime flavor in the frosting.
- Sweetened shredded coconut (2 cups, 7 oz) – Provides texture and a delicious coconut flavor.
What’s in the Gear List
Before you start baking, gather your essential equipment to make the process smooth and enjoyable:
- Mixing bowls – For combining your ingredients.
- Measuring cups and spoons – To ensure accurate measurements for perfect results.
- Electric mixer – For easy mixing and whipping.
- Rubber spatula – To scrape down the sides of the bowl and fold ingredients.
- 9-inch round cake pans – To bake your cake layers evenly.
- Cooling rack – Essential for cooling the cakes before frosting.
Method: Key Lime Coconut Cake

Now, let’s get into the step-by-step method to create your Key Lime Coconut Cake.
Step 1: Preheat Your Oven
Preheat your oven to 350°F (175°C). Grease and flour your two 9-inch round cake pans to prevent sticking.
Step 2: Prepare the Cake Batter
In a large mixing bowl, beat the 6 large eggs and 1 cup of granulated sugar together until light and fluffy. This should take about 3-5 minutes.
Step 3: Mix Dry Ingredients
In another bowl, whisk together 1 cup of all-purpose flour and 1 teaspoon of baking powder. Gradually add this dry mixture to the egg and sugar mixture, mixing until just combined.
Step 4: Incorporate Lime Juice and Water
Add 1/4 cup of freshly squeezed lime juice and 3/4 cup of warm water to the batter. Mix until fully incorporated, ensuring a smooth consistency.
Step 5: Bake the Cake
Divide the batter evenly between the prepared cake pans. Bake in the preheated oven for 25-30 minutes or until a toothpick inserted into the center comes out clean. Allow the cakes to cool in the pans for about 10 minutes before transferring them to a cooling rack to cool completely.
Step 6: Make the Frosting
In a mixing bowl, beat 8 oz of softened cream cheese with 1 cup of granulated sugar until creamy. Add 16 oz of cold full-fat sour cream, 3 tablespoons of freshly squeezed lime juice, and 1 tablespoon of lime zest. Mix until smooth and well combined.
Step 7: Assemble the Cake
Once the cakes are completely cool, place one layer on a serving platter. Spread a generous amount of frosting on top of the first layer, then sprinkle with 1 cup of sweetened shredded coconut. Place the second layer on top and frost the top and sides of the cake with the remaining frosting. Decorate the top with additional coconut if desired.
Step 8: Chill and Serve
Refrigerate the cake for at least 30 minutes before serving to allow the flavors to meld together. Slice and enjoy your refreshing Key Lime Coconut Cake!
Seasonal Twists
To keep your Key Lime Coconut Cake exciting, consider these seasonal twists:
- Berry Surprise – Add fresh berries like strawberries or blueberries between the layers for a burst of flavor.
- Pineapple Passion – Incorporate crushed pineapple into the frosting for an extra tropical flair.
- Chocolate Drizzle – Drizzle melted dark chocolate over the top for a sweet contrast to the tangy lime.
- Ginger Snap – Add ground ginger to the cake batter for a warm, spicy kick.
Troubles You Can Avoid
Here are some common pitfalls to watch out for when making your Key Lime Coconut Cake:
- Overmixing the batter can lead to a dense cake—mix until just combined.
- Make sure your eggs are at room temperature for better incorporation into the batter.
- Allow the cakes to cool completely before frosting to prevent melting the frosting.
- Use freshly squeezed lime juice for the best flavor—bottled lime juice can be too tart or artificial.
Keep It Fresh: Storage Guide
To ensure your Key Lime Coconut Cake stays fresh and delicious, follow these storage tips:
Store the cake in an airtight container in the refrigerator for up to 5 days. If you plan to enjoy it later, it can also be frozen. Wrap individual slices tightly in plastic wrap and place them in a freezer-safe container for up to 3 months. When ready to eat, thaw overnight in the refrigerator and enjoy!
Troubleshooting Q&A
Why did my cake come out dense?
A dense cake is often the result of overmixing or using cold ingredients. Be sure to mix until just combined and use room temperature eggs and liquids.
Can I substitute the cream cheese in the frosting?
Yes! You can use mascarpone cheese or whipped coconut cream as alternatives to cream cheese for a different flavor profile.
What should I do if my cake layers are uneven?
If your cake layers are uneven, you can level them with a serrated knife once they have cooled completely. This will help achieve a more professional look.
How can I make this cake gluten-free?
Simply substitute the all-purpose flour with a 1:1 gluten-free flour blend, and your Key Lime Coconut Cake will be gluten-free and just as delicious!
Next Up in Your Queue
After savoring your Key Lime Coconut Cake, explore these delightful recipes:
- Mango Coconut Chia Pudding – A refreshing, healthy dessert with tropical flavors.
- Pineapple Upside-Down Cake – A classic dessert with a tropical twist.
- Lemon Coconut Bars – A zesty, chewy treat perfect for any occasion.
- Banana Coconut Bread – A moist and flavorful bread that’s great for breakfast or dessert.
Ready, Set, Cook
Now that you have everything you need to create this luscious Key Lime Coconut Cake, it’s time to gather your ingredients and start baking. With each step, you’ll be closer to enjoying a slice of this delightful dessert. The blend of tangy lime, sweet coconut, and creamy frosting will transport you to a tropical paradise with every bite. Happy baking!

Key Lime Coconut Cake
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). Grease and flour your two 9-inch round cake pans to prevent sticking.
- In a large mixing bowl, beat the 6 large eggs and 1 cup of granulated sugar together until light and fluffy. This should take about 3-5 minutes.
- In another bowl, whisk together 1 cup of all-purpose flour and 1 teaspoon of baking powder. Gradually add this dry mixture to the egg and sugar mixture, mixing until just combined.
- Add 1/4 cup of freshly squeezed lime juice and 3/4 cup of warm water to the batter. Mix until fully incorporated, ensuring a smooth consistency.
- Divide the batter evenly between the prepared cake pans. Bake in the preheated oven for 25-30 minutes or until a toothpick inserted into the center comes out clean. Allow the cakes to cool in the pans for about 10 minutes before transferring them to a cooling rack to cool completely.
- In a mixing bowl, beat 8 oz of softened cream cheese with 1 cup of granulated sugar until creamy. Add 16 oz of cold full-fat sour cream, 3 tablespoons of freshly squeezed lime juice, and 1 tablespoon of lime zest. Mix until smooth and well combined.
- Once the cakes are completely cool, place one layer on a serving platter. Spread a generous amount of frosting on top of the first layer, then sprinkle with 1 cup of sweetened shredded coconut. Place the second layer on top and frost the top and sides of the cake with the remaining frosting. Decorate the top with additional coconut if desired.
- Refrigerate the cake for at least 30 minutes before serving to allow the flavors to meld together. Slice and enjoy your refreshing Key Lime Coconut Cake!
Notes
- Use freshly squeezed lime juice for the best flavor.
- Store leftovers in an airtight container in the refrigerator for up to 5 days.
- To freeze, wrap slices in plastic wrap and store in a freezer-safe container for up to 3 months.
