To take a little liberty with Wilde, “It is the key lime cupcake, not the priest, that gives us absolution.”
- 1 cup (2 sticks) unsalted butter, room temperature
- 3 cups powdered sugar, divided
- 7 teaspoons finely grated key lime peel, divided
- 2 large eggs
- 1 1/4 cups self-rising flour (if you can only find all-purpose flour, add 1 1/2 teaspoons of baking powder and 1/2 teaspoon of salt per cup of flour)
- 1/4 cup light sour cream (or buttermilk)
- 4 tablespoons fresh key lime juice, divided
- 12 blackberries (optional)
- Preheat oven to 350°F. Line 12 muffin cups with paper liners. Using electric mixer, beat 3/4 cup of butter, 1 1/2 cups powdered sugar, and 4 teaspoons lime peel in large bowl until blended, then beat until fluffy and pale yellow. Add eggs 1 at a time, beating to blend after each addition. Beat in half of flour. Add sour cream and 2 tablespoons lime juice; beat to blend. Beat in remaining flour.
- Drop equal amounts of batter into each muffin liner.
- Optionally, drop a blackberry on top of each blob of batter, pushing it in only slightly.
- Bake cupcakes until tester inserted halfway into centers comes out clean, about 23 minutes. Cool cupcakes in pan on rack.
- Meanwhile, blend remaining 1 1/2 cups powdered sugar, quarter cup of butter, 2 tablespoons lime juice, and 3 teaspoons lime peel in small bowl. When the cakes are cool, ice.





















