Loaded M&M Oreo Cookie Bars

"These dense bars are a texture lover's dream. There's an abundance of crunchy chopped Oreos and M&M's, contrasted with soft, buttery, moist dough. The bars come together in 1 bowl, without a mixer, in 5 minutes, and are ready in under a half hour - great when you need a dessert in a hurry. The recipe is ripe for substitutions, and use it as an opportunity to clean out your pantry and use up your half-eaten bags and odds-and-ends. See blog post for ideas. Pantry cleanout never tasted so good...."