Step 1

Preheat oven to 350˚F.

Step 2

Beat peanut butter, butter, and both sugars until light and creamy. Gradually add in the 2 eggs and 2 tsp vanilla.

Step 3

In a separate bowl combine the flour, baking powder, and salt.  Mix with the peanut butter mixture one cup at a time.  Once combined, spread in a 9"x13" pan and sprinkle the chocolate chips over the top.

Step 4

Cook 5 minutes then remove and use a knife to swirl the chocolate evenly into the bars.  Return to oven and cook 30 more minutes.