1. Preheat oven to 350 degrees (or 325 depending on your pan, just read the back of the box!) and grease aa 8 or 9 inch pan! I also used parchment paper.

2. Combine brownie mix, egg, oil and water. Pour into pan.

3. In a small bowl combine peanut butter, melted butter and powdered sugar. Drop spoonfuls into the pan with the brownie batter and then use a knife to swirl. See video!

4. Bake for 30-35 minutes depending on the size of your pan and how gooey your like your brownies.

5. Cover the baked brownies with marshmallows and then return to the oven on BROIL for 2-3 minutes, but watch the marshmallows brown or else you may burn them! Each oven is different and the mallows can go from perfectly toasted to burned in a few seconds.

6. Let cool and enjoy!