- Nonstick cooking spray
- 3 cups graham cracker crumbs, (about 2 sleeves of crackers pulverized in a food processor)
- 1/2 cup brown sugar, packed
- 14 tablespoons unsalted butter, melted
- 12 ounces milk chocolate chips
- 1 tablespoon vegetable oil
- 10 ounces marshmallows
Coat a 13x9-inch baking dish with nonstick cooking spray then line with a sheet of parchment paper. Spray again lightly.
In a bowl, combine the graham cracker crumbs and brown sugar. Mix together with your fingertips until combined. Add the melted butter and combine thoroughly using a fork.
Melt the chocolate in a bowl in the microwave at 30-second intervals. Stir in the vegetable oil. Pour chocolate over the graham cracker crust and spread into an even layer with a spatula.
While chocolate is still soft, press the marshmallows into the top. Place in fridge to chill just until chocolate firms up.
To serve, preheat broiler to medium, and arrange a rack in the bottom 1/3 of the oven. Broil the s’mores bars lightly, just until golden brown, about 5 minutes.
Place back in the fridge to set chocolate. Lifting out the parchment to remove from the dish, slice into 12 squares and enjoy.