Bright, tangy, and a little chewy, this Starbucks Lime Frosted Coconut Bars Copycat brings a sunny twist to your dessert table. You’ll love the buttery crust, warm toasted coconut, and zesty lime frosting all together. If you like coconut and lime together, you might enjoy our mango-chili-lime chicken bowls with coconut rice for a savory meal that shares those same tropical flavors.

Why Make This Recipe

Quick & Easy: simple steps and common ingredients.
Family Favorite: kids love the sweet coconut and tangy lime.
Budget-Friendly: pantry staples create a bakery-style treat.

This recipe stands out because of the contrast between the crisp, buttery base and the soft coconut layer, finished with a bright lime frosting. It smells warm and toasty from the oven, and the frosting adds a fresh, citrus brightness that makes every bite feel cozy and special. These bars bring a little comfort and a little sunshine—perfect for sharing at home.

Ingredients

For the base:

1 cup (226 g) unsalted butter, softened
1/2 cup (100 g) granulated sugar
2 cups (240 g) all-purpose flour
1/4 teaspoon fine salt
1 teaspoon vanilla extract

For the coconut layer:

1 (14 oz / 400 g) can sweetened condensed milk
1 1/2 cups (135 g) sweetened shredded coconut
1/2 teaspoon vanilla extract

For the lime frosting:

2 cups (240 g) powdered sugar, sifted
2–3 tablespoons fresh lime juice (start with 2 tbsp)
2 tablespoons unsalted butter, softened
1 teaspoon lime zest
Pinch of salt

Helpful notes:

Use unsalted butter so you control the salt level.
Fresh lime juice and zest give the best bright flavor.

How to Make Starbucks Lime Frosted Coconut Bars Copycat

Preheat your oven to 350°F (175°C). Line a 9×13-inch pan with parchment paper, leaving an overhang to lift the bars later. (This makes removing bars easy.)
Make the base: Beat 1 cup softened unsalted butter with 1/2 cup granulated sugar until smooth and pale, about 2 minutes. Add 1 teaspoon vanilla, then mix in 2 cups flour and 1/4 teaspoon salt until a soft dough forms. (Don’t overmix; you want a tender crust.)
Press the dough evenly into the prepared pan. Bake 15–18 minutes until the edges are light golden. The crust will smell buttery and warm. (A slightly golden edge means a firm, not dry, base.)
Make the coconut layer while the crust bakes: Stir together 1 can sweetened condensed milk, 1 1/2 cups shredded coconut, and 1/2 teaspoon vanilla. The mixture will be thick and sticky.
When the crust is ready, spread the coconut mixture over the hot crust in an even layer. Return the pan to the oven and bake another 12–15 minutes, until the coconut top is lightly golden and set. (Toasted coconut gives a nice nutty aroma.)
Cool the pan on a wire rack for about 30 minutes so the topping firms up a bit before frosting. (Frosting warm bars will melt the icing.)
Make the lime frosting: Beat 2 tablespoons softened butter with 2 cups sifted powdered sugar, 2 tablespoons fresh lime juice, 1 teaspoon lime zest, and a pinch of salt. Add the extra tablespoon of lime juice only if you need to thin the frosting to spreadable consistency. The frosting should be smooth and glossy with a bright lime scent.
Spread the frosting evenly over the cooled bars. Chill the pan in the fridge for at least 30 minutes to set the frosting for cleaner slices.
Use the parchment overhang to lift bars from the pan. Cut into squares or rectangles. Serve at room temperature or slightly chilled.

How to Serve Starbucks Lime Frosted Coconut Bars Copycat

Serve on a simple white plate to show off the pale green frosting and toasted coconut.
Garnish with extra lime zest or a light sprinkle of toasted coconut for texture and color.
Pair with a cold glass of milk, hot coffee, or a tropical iced tea; for a dessert spread, offer alongside our easy rice krispie millionaires bars recipe.

How to Store Starbucks Lime Frosted Coconut Bars Copycat

Room temperature: Keep in an airtight container for up to 2 days. The frosting may soften a bit.
Refrigerator: Store in an airtight container for up to 1 week. Bring to room temperature before serving for best texture.
Freezer: Freeze uncut bars wrapped tightly in plastic and foil for up to 2 months. Thaw overnight in the fridge, then bring to room temperature.
Reheat: Warm a single bar for 8–10 seconds in the microwave if you like a slightly softer frosting, or leave at room temp to enjoy the original texture.

Tips to Make Starbucks Lime Frosted Coconut Bars Copycat

Use freshly zested lime for the brightest flavor.
Press the crust firmly and evenly to avoid a crumbly base.
Don’t overbake the coconut layer; aim for light golden edges.
Chill before cutting to get neat slices.
If frosting is too thick, add lime juice 1/2 teaspoon at a time until spreadable.

Variation

Gluten-free: Swap the 2 cups all-purpose flour for a 1:1 gluten-free flour blend and add 1/4 teaspoon xanthan gum if your blend doesn’t include it.
Less sweet: Use unsweetened shredded coconut and reduce powdered sugar in the frosting by 1/4 cup, then add extra lime juice to taste.

FAQ 1: Can I use unsweetened condensed milk or reduce sugar?

You need sweetened condensed milk to bind the coconut and add sweet chewiness. Using unsweetened condensed milk will change texture and sweetness; try reducing the powdered sugar in the frosting a little instead.

FAQ 2: How do I get a thinner lime frosting without losing flavor?

Add lime juice in very small amounts (1/2 teaspoon at a time) until spreadable. Taste as you go so you keep the lime brightness without making the frosting runny.

FAQ 3: Can I make these bars ahead for a party?

Yes. Make them a day ahead, chill fully, then slice and arrange on a platter. They keep and travel well when stored in a single layer or with parchment between layers.

Conclusion

These lime frosted coconut bars bring a warm, toasty coconut layer and a bright, tart frosting together in every bite. They feel cozy and familiar while the lime adds a lively note that keeps you reaching for another square. I hope your family loves the mix of textures — the crisp base, chewy coconut, and silky lime glaze. If you try this copycat, please leave a comment and a star rating so others can find it, and pin or share on Facebook to spread the sunshine. For one more copycat take on these bars, check this recipe at Lime Frosted Coconut Bars Starbucks – Pies and Tacos. What twist did you try? Let us know below!