Loaded M&M Oreo Cookie Bars INGREDIENTS: 1/2 cup unsalted butter (1 stick), melted 1 large egg 1 cup light brown sugar, packed 1 tablespoon vanilla extract 1 cup all-purpose flour 18 Oreo Cookies, coarsely chopped (I used Oreo Chocolate Birthday Cake Sandwich Cookies; another type of chocolate sandwich cookie may substituted, or abou


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