Preheat the oven to 350 degrees F (180 degrees C).
Cream together brown sugar and butter. Beat in peanut butter, eggs, and vanilla. Add flour, cornstarch, baking soda, salt, and baking powder. Stir in chocolate chips.
Drop 1 1/2 teaspoonfuls of dough 2 inches apart onto ungreased cookie sheets. Flatten slightly because they do not spread much while baking.
Bake in the preheated oven for 10 minutes.
Nutritional Facts
Per 24 servings
Calories: 281
Carbohydrate: 32g
Fat: 16g
Fiber: 2g
Protein: 5g
Sugar: 18g
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