Key Lime Ermine Frosting
This Key Lime Ermine Frosting is light, silky, and full of bright citrus flavor from fresh key lime juice and zest. It whips up into a smooth, cloud-like frosting that’s less sweet than traditional buttercream but still rich enough to pipe or spread beautifully!
Servings: 3 cups
Calories: 2624kcal
Ingredients
- ¾ cup fresh key lime juice, from about 18 to 24 key limes (or bottled key lime juice)
- 5 tablespoons all-purpose flour
- 1 cup 2 sticks / 227 g unsalted butter, room temperature
- 1 cup (200 g) granulated sugar
- 2 to 3 tablespoons key lime zest, from 3 to 4 key limes
- ½ teaspoon vanilla extract
- 1 pinch kosher salt
Instructions
- n a medium saucepan over medium heat, whisk together the key lime juice and flour until smooth.
- Cook, whisking constantly, until the mixture thickens to a pudding-like consistency and begins to bubble, about 2 to 4 minutes. Continue cooking for 1 additional minute while whisking.
- Remove from heat and transfer the mixture to a shallow bowl or plate. Press plastic wrap directly onto the surface and let cool completely to room temperature.
- In the bowl of a stand mixer with the paddle attachment (or using a handheld mixer), cream the butter and sugar together on medium-high speed until very light and fluffy, about 4 to 5 minutes.
- Add the cooled lime mixture, lime zest, vanilla extract, and salt. Beat on medium speed until combined, then increase to high speed and whip until smooth, light, and fluffy, about 3 to 5 minutes more.
- If the frosting feels too soft for spreading or piping, refrigerate for 15 to 30 minutes before using.
Nutrition
Serving: 1recipe (3 cups) | Calories: 2624kcal