Champagne Cake:
- 3 egg whites
- 1 and 1/3 cup cups champagne
- 1 (15.25-ounce) box white cake mix
- 1/3 cup vegetable oil
Champagne Buttercream Frosting:
- 2 sticks unsalted butter (softened)
- 4 and 1/2 cups confectioners' sugar
- 2 teaspoons vanilla extract
- 6 tablespoons champagne
To Assemble:
- silver dragees (to garnish)