Key Lime Coconut Cake (VIDEO)
This post may contain affiliate links. Read my disclosure policy.
This key lime cake is the ultimate summer party cake. It’s pummeled with crunchy toasted coconut and boasts the juice from 5 limes. The punch of lime juice and zest is refreshing and so tasty. We loved the delicate, fluffy and moist cake layers. Plus it’s not overly sweet. This is a highly enjoyable cake! It also refrigerates and freezes well.
One of my readers, Lena shared this recipe with us using our 4-ingredient sponge cake as a base. She described it as “A bite of heaven. Super moist, airy, light and the sour cream really adds to the lightness and tartness of the cake.” I couldn’t agree more.
The frosting is brilliant! Lana, thank you so much for sharing this with us :). P.S. Lana shared that this cake works beautifully with gluten free flour for those with dietary restrictions, which is so great to know!
Watch How to make Key Lime Cake:
Grab a tiny bag of popcorn and enjoy this 4 minute video recipe!
Now go forth and make Key Lime Cake! I hope you enjoy these video recipes. We love making them for you! 🙂
Print The Key Lime Cake Recipe ↓↓↓
Key Lime Coconut Cake
1 Recipe for 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
Key Lime Syrup Ingredients:
- 1/4 cup freshly squeezed lime juice from 3 medium limes
- 3 Tbsp granulated sugar
- 3/4 cup warm water
Key Lime Frosting Ingredients:
- 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
- 2 cups 7 oz sweetened shredded coconut
How to Make Key Lime Cake:
Toast coconut at 350˚F in a small baking pan in oven, stirring a few times, especially towards the end, until golden and dry, 7 to 10 minutes. Set aside to cool.
Make 4-Ingredient Sponge Cake and set aside to cool. Get the recipe on natashaskitchen.com and be sure to watch the video tutorial.
How to Make Key Lime Frosting:
In the bowl of your mixer fitted with whisk attachment, beat together cream cheese and 1 cup sugar on high speed 3 minutes until whipped, scraping down the bowl as needed.
Beat in 16 oz cold sour cream until smooth (1 min on high). Add lime zest and juice and beat to combine (1 minute on high). Refrigerate frosting if not using right away.
How to Make Key Lime Cake 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.
How to Assemble Key Lime Cake:
Slice cake layers in half with a serrated knife. Place the first layer, cut-side-up on a cake platter. Brush with 1/4 of the lime syrup. Top with a generous amount of cream. Repeat with remaining cake layers then cover the entire cake with remaining cream.
Cover the entire cake generously with toasted and cooled coconut flakes, using your hands to scoop coconut onto the sides, pressing gently to adhere. The coconut flakes are crispiest if served right away but it is easier to slice the cake once it's had a chance to set in the refrigerator for about 2 hours.
Cake can be covered and refrigerated up to a week. I've also frozen portions of it then thawed with great results - I loved it still partially frozen.
If you make this recipe, I’d love to see pics of your creations on Instagram, Facebook and Twitter! Hashtag them #natashaskitchen