INGREDIENTS
1/2 cup
butter, softened
1/2 cup
sugar
1/2 cup
packed light brown sugar
1/2 cup
creamy peanut butter
1
egg
1 1/4 cups
all-purpose flour
1/2 tsp
baking soda
1/2 tsp
baking powder
salt (optional; and leave it out if you're using salted butter)