Adapted from Picky Palate
1 box GF brownie mix (you could also make it from scratch if you prefer, I just used what I had on hand)GF graham crackers (I used 2.5 rows of the S'moreables)
4 Tropical Source GF/DF chocolate bars (Hershey's work if you can have dairy)
20 large marshmallows
Preheat oven to 350 F and line an 8x8 baking pan with tin foil sprayed with cooking spray. Prepare the brownie mix according to the package and pour half the brownie batter into the pan. Put a layer of graham crackers on the batter then a layer of the chocolate bars and marshmallows. Pour the remaining batter over the marshmallows and spread evenly as much as possible. It will not entirely cover all of the marshmallows and that's OK. Bake for 40 minutes or until a toothpick comes clean from the center. You have to let it cool completely, it's torture I know! Once it's cooled remove from the pan and cut into squares.