Oreo M & M Bars Ingredients ½ cup butter, melted 1 egg 1 cup light brown sugar, packed 1 tablespoon vanilla 1 cup all-purpose flour 18 Oreo Cookies, coarsely chopped ½ cup M&M minis, holiday colors Instructions Preheat oven to 350F. Line 8-by-8 pan with nonstick foil. Melt the butter in the microwave. Let cool