2 cups flour 1/2 cup creamy peanut butter 1 tsp baking soda 1 Tbsp. vanilla 1 egg 1 egg yolk 1 cup butter 1 tsp salt 1/4 cup brown sugar 1/2 cup white sugar Pre heat oven to 375 degrees F. In a large bowl, mix butter, peanut butter, and both sugars. Add egg, egg yolk, vanilla; continue to mix. Add baking soda, salt, and flour, Mix together. Form dough into 1 inch balls and place on a lined baking sheet, use a spoon and gently flatten balls. Bake for ten minutes or until golden brown.