INGREDIENTS
3 tbsp
Citrus, fresh zest
1/4 cup
Citrus, freshly squeezed juice
2
Eggs, large
3/4 tsp
Baking powder
1/4 tsp
Baking soda
2 1/2 cups
Flour
1
Powdered sugar
1/2 tsp
Salt
1 1/2 cups
Sugar
1 tsp
Vanilla extract
10 tbsp
Butter, unsalted
1 cup
Champagne or prosecco