Cupcakes

• 3 1/2 cups (390g) all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup (225g) butter, softened
• 1 1/2 cups (340g) granulated sugar
• 2 teaspoons vanilla extract
• 3 eggs
• 2 (8-ounce/225g) cartons dairy sour cream
• 2 teaspoons finely shredded lemon peel

Lemon Frosting

• 3 tablespoons (42g) butter, softened
• 1 cup (110g) sifted powdered sugar
• 2 tablespoons lemon juice
• 3/4 teaspoon vanilla extract
• 1 1/4 cups (140g) sifted powdered sugar
• milk (2 to 3 teaspoons if necessary)
• 1 teaspoon shredded lemon peel

Garnish (optional)

• lime slices and some lime peel