Key Lime Coconut Cake Recipe

This Key Lime Coconut Cake is the ultimate dessert for lime and coconut lovers. Featuring a moist sponge cake layered with a tangy key lime syrup and creamy key lime frosting, it’s the perfect balance of sweet and tart. The toasted coconut topping adds a crispy, flavorful crunch that perfectly complements the rich, smooth frosting. Ideal for special occasions, holidays, or just as a refreshing treat, this cake will transport your taste buds to a tropical paradise. With fresh lime juice, zest, and shredded coconut, it’s an unforgettable dessert everyone will love!

Ingredients

For the Sponge Cake (makes two 9-inch cakes)

• 6 large eggs (room temperature)
• 1 cup granulated sugar
• 1 cup all-purpose flour
• ½ tsp baking powder

For the Key Lime Syrup

• 1/4 cup freshly squeezed lime juice (from 3 medium limes)
• 3 tbsp granulated sugar
• 3/4 cup warm water

For the Key Lime Frosting

• 8 oz cream cheese (softened)
• 1 cup granulated sugar
• 16 oz cold sour cream (full fat)
• 3 tbsp lime juice (freshly squeezed, from 2 medium limes)
• 1 tbsp lime zest (from 2 medium limes)

For the Topping

• 2 cups (7 oz) sweetened shredded coconut

Instructions

1. Toast the Coconut:
Preheat the oven to 350°F (175°C). Spread the shredded coconut in a small baking pan and toast in the oven, stirring a few times to prevent burning, until golden and dry (about 7-10 minutes). Set aside to cool.

2. Make the Sponge Cake:
Prepare the sponge cake by following your favorite recipe or using the one provided on Natasha’s Kitchen. Set the cake aside to cool completely before assembling the layers.

3. Prepare the Key Lime Frosting:
In the bowl of a stand mixer, combine the softened cream cheese and 1 cup sugar. Beat on high for about 3 minutes until light and whipped. Add the cold sour cream, lime zest, and lime juice, and continue beating on high for another minute until smooth and well combined. Refrigerate the frosting until you’re ready to assemble the cake.

4. Make the Key Lime Syrup:
In a measuring cup, combine 1/4 cup fresh lime juice, 3/4 cup warm water, and 3 tbsp sugar. Stir to dissolve the sugar and set aside.

5. Assemble the Cake:
Once the sponge cake is completely cooled, slice the cake layers in half horizontally with a serrated knife. Place the first cake layer on a cake platter, cut-side-up, and brush with 1/4 of the lime syrup. Top with a generous layer of key lime frosting. Repeat with the remaining layers, finishing with a final coat of frosting on top.

6. Add the Coconut Topping:
Cover the entire cake generously with toasted coconut flakes, pressing them gently into the sides of the cake. If serving immediately, the coconut will be crisp. However, to make slicing easier, let the cake set in the refrigerator for about 2 hours before serving.

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Tips

• Make-Ahead: The cake layers can be made a day in advance and stored in an airtight container to save time.
• Crisp Coconut: If you want to keep the coconut crispy, avoid refrigerating the cake for too long before serving.
• Room Temperature Ingredients: Make sure your eggs and cream cheese are at room temperature to help create a smooth frosting.

Variations and Substitutions

• Lime Substitution: If key limes are hard to find, regular limes can be used for the syrup and frosting.
• Coconut Variations: You can use unsweetened shredded coconut for a less sweet topping or try toasted pecans or macadamia nuts for a different texture.
• Frosting Adjustment: If you prefer a lighter frosting, you can substitute part of the sour cream with whipped cream for a fluffier texture.

FAQs

• Can I freeze the Key Lime Coconut Cake?
  Yes, you can freeze the cake layers and frosting separately, but the coconut topping is best added fresh just before serving.
• How can I make this cake gluten-free?
  Use a gluten-free all-purpose flour blend as a substitute for regular flour to make this cake gluten-free.

Serving Suggestions

• Pair with Beverages: Serve this cake with a chilled glass of iced tea, lemonade, or a refreshing coconut water drink to enhance the tropical flavors.
• Garnish Options: Add additional lime zest or fresh mint leaves as a garnish for extra color and flavor.

Why You’ll Love This Recipe

This Key Lime Coconut Cake is the perfect combination of tart and sweet flavors with a refreshing lime-infused syrup, creamy frosting, and crispy coconut topping. Whether you’re celebrating a special occasion or just want a delightful treat, this cake will leave your guests craving more. The light, fluffy sponge cake and zesty key lime frosting make each bite irresistible, while the toasted coconut adds a satisfying crunch that ties everything together.