Easy to make Key Lime Cupcakes

Ingredients: 
CUPCAKES
1 cup all purpose flour 
3/4 cup self-rising flour 
1/2 cup (1 stick) unsalted butter, room temperature 
1 1/4 cup sugar 
2 large eggs 
2 1/2 tablespoons fresh lime juice 
1 tablespoon finely grated lime peel 
1/4 teaspoon neon-green food coloring 
3/4 cup buttermilk

FROSTING
1 8-ounce package cream cheese, room temperature 
1 1/2 cups powdered sugar 
1/2 cup (1 stick) unsalted butter, room temperature 
1 tablespoon finely grated lime peel 
1/2 teaspoon vanilla extract

Directions:
CUPCAKES
Preheat oven to 350 degrees F. Line standard muffin pan with 12 paper liners. Whisk both flours in medium bowl. Beat butter in large bowl until smooth. Add sugar; beat to blend. Beat in eggs one at a time, then next three ingredients (batter may look curdled). Beat in flour mixture in three additions alternately with buttermilk in two additions. Spoon a scant 1/3 cup batter into each liner. 
Bake cupcakes until tester inserted into center comes out clean, 20 to 25 minutes. Cool 10 minutes. Remove from pan; cool.

FROSTING
Beat all ingredients in medium bowl until smooth. Spread over cupcakes.