Delicious, 10/10! So happy these turned out, given that I was not sure about the alternate pan size I used and the decision to not use parchment. And while they are probably good without, I highly recommend doing a frosting to top them, as that added another flavor dimension.
Link to my YouTube video of preparation: https://youtu.be/7B5v6X0iEFE
Original recipe credit: https://www.sweetestmenu.com/mandm-peanut-butter-cookie-bars/
Recipe below contains my modifications.
Ingredients:
175 g. all-purpose flour
1/2 tsp. baking powder
1/4 tsp. salt
1/2 c. (1 stick) unsalted butter, room temperature
1 c. brown sugar (packed)
1 tsp. vanilla extract
1/2 c. smooth peanut butter (do NOT use natural/no-stir types)
1 large egg
1/2 c. semi-sweet chocolate chips
3/4 c. mini M&Ms (or regular)
optional: vanilla frosting, to top/decorate (I used my own, for which I do not have a set recipe)
Directions:
1. Generously grease a Christmas tree shaped baking pan (or 8" x 8" pan) and heat oven to 350°F.
2. Add the flour, baking powder, and salt to a small bowl. Set aside.
3. In the bowl of a stand mixer, cream butter and brown sugar together until light and fluffy.
4. Mix in the vanilla and peanut butter until just combined.
5. Mix in the egg until well combined.
6. Sift in the reserved flour mixture, then mix until combined.
7. Stir in by hand the chocolate chips and M&Ms. Press the mixture into the prepared baking pan, then bake for 28-30 min (I think I went closer to 33, likely due to the pan shape).
8. Leave in pan to cool completely before removing and decorating. Enjoy!