The crunchy graham cracker crust marries with a rich and fudgy brownie swirled with marshmallow fluff to create a dessert made in heaven. Or your kitchen! So much flavor, but not that much work.
Preheat the oven to 350 degrees, then line 9x13 pan with tin foil.
Place graham crackers in food processor and pulse until fine crumbs. Mix with sugar.
Melt butter and stir into crumbs. Place crumbs into 9x13 pan, and press with a spatula. Bake for 8 minutes.
6 tablespoons unsalted butter, 11 full graham crackers
Make brownie batter while crust bakes. Add sugar, cocoa powder, baking soda, and salt to bowl and stir.
1/4 cup sugar, 3/4 cup cocoa powder, 1/2 teaspoon baking soda, 1/4 teaspoon salt
Add oil and hot espresso/coffee (or water), and stir until combined. Beat eggs, then add to batter along with vanilla. Stir until well combined. Add flour, and gently mix just until flour is no longer visible.
2/3 cup vegetable oil, 1/2 cup hot espresso/coffee, 2 eggs, 1 teaspoon vanilla, 1 1/2 cups flour
Pour the brownie batter over graham cracker crust. Add marshmallow fluff in dollops over brownie batter.
1 can marshmallow fluff
Use a spatula to lightly swirl marshmallow fluff until marbleized.
Bake at 350 degrees for 35-40 minutes, until a cake tester comes out with just a few crumbs.
Let the brownies cool fully in pan, then place in fridge to firm up graham cracker crust for 1-2 hours before cutting. Store in a tightly sealed container for 2-3 days or freeze up to a month.