1/2 cup butter, softened
1 cup peanut butter
3/4 cup white sugar
1/2 cup firmly packed brown sugar
1 egg
1 tablespoon milk
1 teaspoon vanilla extract
1 1/4 cup all-purpose flour
3/4 teaspoon baking soda
1/2 teaspoon baking powder
1/4 teaspoon salt
Beat together butter and peanut butter until well combined. Add sugars and beat until fluffy. Add egg, milk, and vanilla extract and mix until smooth. Add flour, baking soda, baking powder, and salt and mix just until blended. Roll balls of dough in white sugar before placing on an ungreased baking sheet. Bake at 350 degrees for 10-12 minutes. Don not over bake. Let cookies cool on baking sheet for at least 3 minutes before removing to wire racks to cool completely. Store in an airtight container at room temperature.
