Easy Homemade S'mores Brownies Recipe

0 Preheat the oven to 350°F (175°C). Line a 9x9-inch baking pan with parchment paper, leaving an overhang on the sides.
1 Arrange the graham crackers in a single layer at the bottom of the pan, covering as much of the surface as possible. Break them as needed to fit.
2 Melt the butter and dark chocolate in a small saucepan over low heat, stirring until smooth. Let cool slightly.
3 In a large mixing bowl, whisk together the cocoa powder, baking powder, and salt. Stir in the butter-chocolate mixture and freshly brewed coffee until smooth.
4 Add the sugar, eggs, and vanilla extract. Stir until just combined.
5 Gently fold in the flour, being careful not to overmix. Then, fold in both types of chocolate chips.
6 Pour the brownie batter over the graham cracker layer and spread it evenly.
7 Bake for 45-55 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
8 Remove the brownies from the oven and immediately place the Hershey’s chocolate bars on top in an even layer. Let sit for 2–3 minutes until the chocolate softens, then spread it with a spatula or knife to create a smooth layer.
9 Spread the mini marshmallows on top of the melted chocolate in an even layer.
10 Turn the oven to broil. Place the brownies back on the top rack and broil for 1-3 minutes, or until the marshmallows turn golden brown. Watch closely—they can brown very quickly!
11 Let cool completely before slicing. Grease a very sharp knife and cut into 16 even squares, cleaning your knife between cuts.