Preheat oven to 350°. Line a 8x8 baking pan with parchment paper and set aside.
In a microwave safe bowl, heat butter in microwave until completely melted. Mix in peanut butter until melted in with it. Stir in brown sugar until smooth. Add in egg and vanilla until combined. Incorporate the flour until just combined. Fold in peanut butter chips.
Spread mixture into prepared baking pan and make sure top is level. Create 3 large lines with Hershey's Chocolate Spread going straight across bars going in one direction. Turn pan 90° so the lines are facing you horizontally. Run a knife through the lines vertically in three more rows going through the horizontal lines. Don't swirl too much, you want the chocolate to stay on top.
Place in oven and bake for 20-23 minutes. (Mine were done in 23 minutes.) They will appear to be not done, but trust me they are. They will firm up as they cool and be nice and chewy. Let them cool in pan for about 10 minutes. Pull them out by the parchment paper hanging over the sides and let them cool another 10 minutes. Cut them up into bars and enjoy!