Margarita Cupcakes with Lime Buttercream

Ingredients

• 2 teaspoons lime zest
• 2 tablespoons freshly squeezed lime juice
• 1 1/8 cups cake flour
• 3/4 cup all-purpose flour
• 2 teaspoons baking powder
• 3/4 teaspoon salt
• 1/4 teaspoon baking soda
• 1/2 cup buttermilk
• 1/2 cup butter (at room temperature)
• 1 1/8 cups sugar
• 3 eggs
• 1 1/2 teaspoons lime zest
• 3 tablespoons freshly squeezed lime juice
• 1 1/2 cups butter (at room temperature)
• 3 cups confectioners' sugar (sifted)
• 3 tablespoons tequila
• 1 teaspoon lime oil
• 1/4 cup sour cream
• Additional lime zest for garnish (optional)
• Small lime wedges for garnish (optional)
• Tequila drizzle (1 teaspoon per cupcake (optional))