Grapefruit Cupcakes

Name: Grapefruit Cupcakes
Prep time: 40 min
Cook time: 20 min
Total time: 1 h
Cuisine: American
Ingredients: 3/4 cup butter (softened); 1 1/2 cups sugar; 3 eggs; 1 tsp. vanilla; 1 cup sour cream; 1/4 cup milk; 1/4 cup grapefruit juice; 2 1/2 cup flour; 2 tsp. baking powder; 1/2 tsp. baking soda; 1/2 tsp. salt; 1 Tbsp. finely grated pink grapefruit zest; 8 oz. cream cheese (softened); 4 cups powdered confectioners sugar; 1 tsp. grapefruit zest; 2 tsp. grapefruit juice; Pink sugar