Mousseline Buttercream Frosting
Using only egg whites gives this Mousseline Buttercream frosting a lovely white hue, but it’s also easy to color with food colorings. It’s soft enough to pipe borders and stiff enough to pipe flowers and other embellishments. Customize it with flavoring extracts or flavored liqueurs and spirits such as bourbon, vodka or rum.*
Source: Reily Products
Ingredients
- sugar
- water
- large egg whites, room temperature
- teaspoon cream of tartar
- sticks unsalted butter, room temperature
- Optional additions
- Vanilla or other flavored extract, to taste
- fluid ounces bourbon*
- Food coloring