Champagne and Vanilla Bean Cake

Cake:

• 2 cups all-purpose flour
• 2 tsp baking powder
• 1/2 tsp salt
• 3/4 cup unsalted butter room temperature
• 1 1/3 cup sugar
• 4 lrg egg whites
• 1 1/3 cup champagne or sparkling wine
• 2 tsp high quality vanilla extract or vanilla bean paste

Buttercream:

• 1 cup unsalted butter room temperature
• 3 cups icing sugar
• 4-6 tbsp sparkling wine / champagne
• 2 tsp vanilla bean paste or quality vanilla extract

Assembly:

• 1 tbsp Nonpareils or sprinkles