INGREDIENTS
2 tbsp
Grapefruit, zest
1
Egg, large
1 cup
All-purpose flour
1 1/2 tsp
Baking powder
1/2 cup
Granulated sugar
1/2 cup
Powdered sugar
1/2 tsp
Salt
1 tsp
Vanilla extract
2 tbsp
Grapefruit juice, fresh
1/2 cup
Butter, unsalted
1/4 cup
Whole milk