To LilyTaco: I didn’t have any butter flavoring, but it turned out fine.
For the cupcakes:
.
2 cups flour
1 1/2 teaspoon baking powder
1/2 teaspoon baking soda
1/4 teaspoon salt
1/2 cup (1 stick) unsalted butter, softened
1/2 cup granulated sugar
1/2 cup dark brown sugar, packed
3 large…
(Source: amybites.com)