This recipe is derived from Entenmann's.

INGREDIENTS

1/2 cup (1 stick) butter, softened

1/2 cup peanut butter

1/2 cup sugar

1/2 cup firmly packed light brown sugar

1 egg, beaten

1/2 teaspoon vanilla extract

2/3 cup all purpose flour

1/2 teaspoon baking soda

1/2 teaspoon baking powder

Pinch of salt

1 1/2 cups rolled oats

DIRECTIONS:

Preheat oven to 350 degrees.

Grease baking sheets 

[I always use parchment paper on top of my baking sheets instead of greasing them though]

Place butter and peanut butter in a bowl and beat together. Beat in sugar and brown sugar, then gradually beat in the egg and vanilla extract.

Sift the flour, baking soda, baking powder and salt into a separate bowl, mix together and add to peanut butter mixture. Stir in oats.

Place spoonfuls of the cookie dough onto the baking sheets, spaced well apart to allow for spreading  Flatten slightly with a fork.

Bake in preheated oven for 12 minutes or until lightly browned.

Let cook on the baking sheets for 2 minutes. Transfer to wire rack to cool completely. 

Makes roughly 26 cookies.