Coconut Lime Cupcakes
Moist, tender coconut cupcakes topped with a tangy, zesty lime buttercream frosting. A perfectly balanced tropical treat that is easy to make at home.
- Egg whites provide a strong protein matrix that supports the heavy shredded coconut.
- Real lime juice and zest cut through the rich, buttery sweetness of the frosting.
- Sweetened shredded coconut adds natural moisture and a pleasant chew to every bite.
I still remember the humid Tuesday afternoon in July when I tried to bake a batch of tropical cupcakes for my sister’s backyard baby shower, only to have the entire tray sink into sad, greasy craters.
I stood there in my flour-dusted apron, staring at the deflated mess, and honestly wanted to slide right down onto the linoleum floor and cry.
The culprit, as it turns out, was my overzealous use of canned coconut milk, which completely threw off the liquid-to-fat ratio and collapsed the delicate gluten structure of the cake.
Bear with me here, because baking is pure chemistry.
I tested this with three different brands of coconut milk, and the generic supermarket brand failed every single test because it was too watery and separated instantly.
After testing six different batches, I discovered that using a combination of egg whites for structural lift and sweetened shredded coconut folded directly into the batter yields an incredibly moist crumb without any of the structural instability.
You get all that rich, tropical flavor without the dreaded sinkhole.
If you love coconut as much as I do, you've probably already made my Carolina Coconut Cookies or my decadent No Bake Coconut Cheesecake.
But these cupcakes are hands down the most comforting treat for a sunny afternoon.
For the frosting, I adapted the base from my Buttercream Bunny Cookies to include fresh lime juice and zest, which cuts through the sweet butter beautifully.
If you are looking for another crowd-pleasing cake, check out my Banana Pudding Cupcakes.
Coconut Lime Cupcakes
Ingredients
- 1.5 cups (180g) all-purpose flour
- 1 tsp baking powder
- 0.25 tsp baking soda
- 0.5 tsp Diamond Crystal kosher salt
- 0.5 cup (113g) unsalted butter, softened
- 1 cup (200g) granulated sugar
- 2 large egg whites, room temperature
- 1 tsp pure vanilla extract
- 0.5 tsp coconut extract
- 0.75 cup (180ml) canned unsweetened coconut milk, shaken well
- 0.75 cup (60g) sweetened shredded coconut
- 1 cup (226g) unsalted butter, softened (for frosting)
- 3.5 cups (420g) powdered sugar (for frosting)
- 2 tbsp fresh lime juice (for frosting)
- 1 tbsp lime zest (for frosting)
Directions
- Preheat your oven to 350°F (177°C) and line a 12-cup muffin pan with paper liners.
- Whisk the flour, baking powder, baking soda, and salt together in a medium bowl until combined.
- Beat the softened butter and granulated sugar together in a stand mixer fitted with the paddle attachment on medium-high speed for 3 full minutes until light and fluffy.
- Add the egg whites one at a time, beating well after each addition, then mix in the vanilla and coconut extracts.
- Alternate adding the dry ingredients and the coconut milk to the butter mixture, starting and ending with the dry ingredients, mixing on low speed just until combined.
- Fold in the shredded coconut gently with a rubber spatula, scraping the bottom of the bowl until your wrist cramps to ensure no pockets of flour remain.
- Divide the batter evenly among the cupcake liners, filling each about three-quarters full.
- Bake for 18 to 20 minutes, or until a toothpick inserted into the center comes out clean, then transfer to a wire rack to cool completely.
- For the frosting, beat the softened butter on medium-high speed for 2 minutes until creamy, then gradually add the powdered sugar, lime juice, and lime zest, beating until light and fluffy.
Notes
- I highly recommend using Diamond Crystal kosher salt; if you only have fine table salt, reduce the amount by half (use 1/4 teaspoon instead of 1/2 teaspoon).
- Egg whites are essential here because their high protein content builds a sturdy protein matrix that prevents the heavy shredded coconut from sinking to the bottom of the liners.
- Watch your cupcakes closely starting at the 17-minute mark; coconut-heavy batters contain extra sugars that can transition from beautifully golden to scorched in a matter of seconds.
- After a day in the fridge, the butter in the frosting will firm up significantly, so let the cupcakes sit at room temperature for 20 minutes before serving to restore that luscious, creamy texture.
Serving Suggestions
These cupcakes are a showstopper on their own, but you can easily elevate the presentation for a party or a casual weekend gathering.
- Top each cupcake with a thin, fresh lime wheel right before serving.
- Sprinkle toasted coconut flakes over the buttercream for an extra layer of texture.
- Serve alongside a refreshing glass of homemade peach lemonade to balance the rich coconut flavors.
- Display them on a tiered cake stand decorated with fresh tropical leaves.
- Pair them with a light fruit platter featuring mango and pineapple slices.
Storage and Reheating
Store any leftover cupcakes in an airtight container at room temperature for up to two days.
If you need to keep them longer, pop them into the fridge for up to five days, but make sure the container seals tightly so they don't absorb any refrigerator odors.
I don't recommend freezing fully frosted cupcakes because the lime buttercream can weep and separate as it thaws.
Instead, freeze the unfrosted cupcakes wrapped tightly in plastic wrap for up to three months, then frost them fresh when you are ready to serve.
Ingredient Substitutes
If you find yourself missing an ingredient, here are a few reliable swaps that won't ruin your batch.
- Coconut Milk: You can swap this for whole milk or buttermilk, though you will lose a bit of that deep coconut flavor.
- Lime Juice: Fresh lemon juice works beautifully if you want a lemon-coconut twist instead.
- Sweetened Shredded Coconut: Unsweetened shredded coconut can be used, but add an extra tablespoon of sugar to the batter to compensate.
- Egg Whites: If you don't want to waste yolks, you can use one whole egg, but the cake crumb will be slightly more yellow and dense.
I hope these bright, zesty little cakes bring a bit of sunshine to your kitchen, even if it's just a quiet Tuesday afternoon. Let me know in the comments if you try them, and don't forget to lick the spatula—it's the baker's tax!
Susan Rosie
I've spent over 12 years perfecting recipes so you can cook with confidence. Every dish on Storied Skillet is tested multiple times – because your dinner matters. I believe in simple ingredients, clear instructions, and big flavors.
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