Instructions

1. Preheat your oven to 325º F and line an 8"x8" baking pan with parchment.
2. Cream together the peanut butter, butter and sugars until fluffy.
3. Beat in the egg and vanilla extract.
4. Stir together the flour, baking powder and salt.
5. Add the flour mixture to the peanut butter mixture and stir until combined.
6. Spread the cookie mixture evenly into the prepared pan and sprinkle the chocolate chips on top.
7. Bake for 5 minutes, remove from the oven and using a knife swirl the chocolate into the cookie base.
8. Return the pan to the oven and bake for 25 minutes.
9. Carefully remove the pan and let cool for 10 minutes in the pan.
10. Using the edges of the parchment lift the cookie bars out of the pan and let cool on the counter for 20-30 minutes.
11. Slice and serve.
12. Store leftover bars in an air tight container for up to 3 days.