▢1½ cups all-purpose flour ▢1½ cups quick-cooking rolled oats ▢1 cup packed light brown sugar ▢1 teaspoon salt ▢1 cup plus 2 tablespoons unsalted butter softened, divided ▢1 (14-ounce) can sweetened condensed milk ▢1 (11.5-ounce) bag milk chocolate chips ▢1 cup plain M&M’s
Preheat the oven to 350 degrees F. Grease a 9-x-13-inch baking dish and set aside.
In a large bowl, mix flour, oats, brown sugar, salt and 1 cup butter with a spoon. Remove 1 cup of the mixture and set aside.
Press remaining mixture into the bottom of the prepared baking dish.
In a medium pot, combine condensed milk, chocolate chips and remaining 2 tablespoons butter over medium-low heat. Stir constantly until chips are melted and everything is mixed well.
Pour chocolate mixture over oat layer and spread evenly. Sprinkle reserved oat mixture over the chocolate Top with M&M’s and bake for 25–30 minutes. Let cool completely in the pan before cutting.