Number of serving: 8
1 1/2 cups all-purpose flour
2 teaspoons baking powder
1 cup plain whole-
milk yogurt
1 cup plus 1 tablespoon
sugar
3 teaspoons grated
grapefruit zest (approximately one large grapefruit)
1/2 teaspoon pure vanilla extract
1/2 cup vegetable oil
1/3 cup freshly squeezed grapefruit juice
1 cup confectioners sugar
2 tablespoons freshly squeezed grapefruit juice