INGREDIENTS:
For the Cupcakes:
1½ cups all-purpose flour
1½ teaspoons baking powder
¼ teaspoon salt
½ cup unsalted butter, at room temperature
1 cup granulated sugar
2 eggs, at room temperature
Zest and juice of 1½ limes
2 tablespoons tequila
¼ teaspoon vanilla extract
½ cup buttermilk

To Brush the Cupcakes:
1 to 2 tablespoons tequila

For the Tequila-Lime Frosting:
1 cup unsalted butter, at room temperature
2¾ cups powdered sugar
1 tablespoon lime juice
2 tablespoons tequila
Pinch of coarse salt