This Key Lime Ermine Frosting is light, silky, and packed with bright citrus flavor from fresh key lime juice and zest.It has a smooth, almost whipped texture that feels lighter than traditional buttercream, while still being rich enough to spread or pipe beautifully onto cakes and cupcakes.I absolutely loved it! This is my go-to ermine frosting base, and I love using it for other fruit-forward variations like strawberry ermine frosting, lemon ermine frosting, and orange ermine frosting, too! Want to save this recipe?Just enter your email and get it sent to your inbox! Plus you’ll get new recipes from us every week!Email *Save Recipe Ingredients & Substitutions Key lime juice: Gives the frosting its bright, tangy citrus flavor.

Fresh key lime juice has the best flavor, but bottled key lime juice works well if you want to save time.All-purpose flour: This is what thickens the cooked base and gives ermine frosting its signature silky texture.Make sure to whisk constantly so the mixture stays smooth.

Unsalted butter: Adds richness and creates the light, fluffy texture once whipped.Room-temperature butter is important so the frosting blends smoothly.Granulated sugar: Sweetens the frosting without making it overly heavy.

When whipped with the butter, it helps create that classic airy ermine texture.Key lime zest: Adds concentrated citrus flavor and makes the frosting taste extra fresh and vibrant.Fresh zest makes a big difference here.

Van

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