Champagne cupcakes

Original recipe from gimme some oven!
Oven temp = 350

Champagne Cupcakes:
2 3/4 cups flour
3 tsp baking powder
1 tsp salt
2/3 cups butter
1 1/2 cups sugar
3/4 cup champagne
6 egg whites

Cream butter and sugar. Add flour, baking powder, salt, and champagne and mix will. In another clean bowl, beat egg whites to stiff peaks. Gently fold egg whites into the rest of the ingredients. Fill 24 cupcake cups and bake at 350 for 20 minutes.

Champagne Frosting:
3 1/4 cups powdered sugar
1 tsp vanilla
1/2 cup (1 stick) butter
4 Tbs champagne

Cream butter, sugar, and vanilla. Slowly add champagne, 1 Tbs at a time until the right consistency is reached.