Key Lime Coconut Cake Recipe

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This Key Lime Coconut Cake Recipe is a tropical dream come true! Bursting with tangy key lime flavor and layered with sweet coconut, this soft, moist cake is the ultimate summer dessert. Whether you’re celebrating a special occasion or just want something refreshing and different, this cake will steal the spotlight with every bite.

Key Lime Coconut Cake

Ingredients

For the Cake:

  • 2 1/2 cups all-purpose flour
  • 2 tsp baking powder
  • 1/2 tsp baking soda
  • 1/2 tsp salt
  • 1 cup unsalted butter (room temp)
  • 1 3/4 cups granulated sugar
  • 4 large eggs
  • 1/2 cup key lime juice (fresh or bottled)
  • 1 tbsp key lime zest
  • 1 tsp vanilla extract
  • 1 cup coconut milk (or buttermilk)
  • 1 cup sweetened shredded coconut

For the Frosting:

  • 8 oz cream cheese (softened)
  • 1/2 cup unsalted butter (softened)
  • 4 cups powdered sugar
  • 2 tbsp key lime juice
  • 1 tsp key lime zest
  • 1/2 tsp vanilla extract

For Garnish:

  • Toasted coconut flakes
  • Thin key lime slices or zest (optional)

Instructions

  1. Prep the oven: Preheat to 350°F (175°C). Grease and flour two 9-inch round cake pans or line with parchment paper.
  2. Mix dry ingredients: In a bowl, whisk together flour, baking powder, baking soda, and salt.
  3. Cream butter and sugar: In a large bowl, beat butter and sugar until light and fluffy (about 3 minutes).
  4. Add eggs and flavor: Add eggs one at a time, beating well. Stir in key lime juice, zest, and vanilla.
  5. Alternate additions: Add dry ingredients alternately with coconut milk, beginning and ending with dry. Mix until just combined. Fold in shredded coconut.
  6. Bake: Divide batter between pans and bake 25–30 minutes or until a toothpick comes out clean. Cool completely.
  7. Make frosting: Beat cream cheese and butter until smooth. Gradually add powdered sugar, then mix in lime juice, zest, and vanilla.
  8. Assemble and frost: Layer cakes with frosting in between. Frost top and sides.
  9. Decorate: Sprinkle toasted coconut around the edges or on top. Garnish with lime slices or zest if desired.
  10. Chill: Let the cake chill slightly before slicing for cleaner cuts.

Tips

  • Use fresh key lime juice for the best citrus punch.
  • Don’t overmix the batter—just until combined.
  • Toast coconut in a dry pan or oven for enhanced flavor.
  • Chill the cake before serving for the best texture.
  • Use a zester or microplane to get fine lime zest without bitterness.

Variations & Substitutions

  • Sub lemon or regular lime juice if key limes aren’t available.
  • Add a layer of lime curd between the cakes for extra zing.
  • Use coconut extract for more pronounced coconut flavor.
  • Turn it into cupcakes—just reduce baking time to 18–20 minutes.
  • Make it gluten-free using a 1:1 gluten-free baking flour.

FAQs – Key Lime Coconut Cake Recipe

Q1: Can I make this cake ahead of time?
Yes! Bake the cakes a day ahead and frost before serving. Store covered in the fridge.

Q2: Can I use bottled key lime juice?
Absolutely. Just make sure it’s 100% juice, not from concentrate.

Q3: How do I store leftovers?
Refrigerate in an airtight container for up to 4 days.

Q4: Can I freeze the cake?
Yes, freeze layers (unfrosted) tightly wrapped. Thaw and frost when ready to serve.

Serving Suggestions

  • Pair with iced tea or coconut milk lattes
  • Serve with a dollop of whipped cream on the side
  • Garnish with lime zest and coconut curls for presentation
  • Add a drizzle of key lime glaze for extra tang
  • Serve chilled for the most refreshing experience

Why You’ll Love This Recipe

  • Bursting with bright citrus flavor
  • Perfect balance of sweet and tangy
  • Light and tropical with creamy frosting
  • Looks beautiful on a dessert table
  • Great for spring and summer gatherings
Key Lime Coconut Cake Recipe
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Key Lime Coconut Cake Recipe

Servings

10-12 slices

servings
Prep time

25

minutes
Bake time

30

minutes
Calories

100

kcal

Ingredients

  • For the Cake:

  • 2 1/2 cups all-purpose flour

  • 2 tsp baking powder

  • 1/2 tsp baking soda

  • 1/2 tsp salt

  • 1 cup unsalted butter (room temp)

  • 1 3/4 cups granulated sugar

  • 4 large eggs

  • 1/2 cup key lime juice (fresh or bottled)

  • 1 tbsp key lime zest

  • 1 tsp vanilla extract

  • 1 cup coconut milk (or buttermilk)

  • 1 cup sweetened shredded coconut

  • For the Frosting:

  • 8 oz cream cheese (softened)

  • 1/2 cup unsalted butter (softened)

  • 4 cups powdered sugar

  • 2 tbsp key lime juice

  • 1 tsp key lime zest

  • 1/2 tsp vanilla extract

  • For Garnish:

  • Toasted coconut flakes

  • Thin key lime slices or zest (optional)

Directions

  • Preheat oven, prepare pans.
  • Mix dry ingredients.
  • Cream butter and sugar.
  • Add eggs, key lime juice, zest, vanilla.
  • Alternate adding dry mix and coconut milk. Fold in coconut.
  • Pour into pans and bake. Cool completely.
  • Make frosting and assemble cake.
  • Decorate with toasted coconut and lime slices.
  • Chill, slice, and serve!

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