Key Lime Cupcakes

Ingredients

• 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
• 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