1 Preheat the oven to 350°; lightly butter a 3 1/2 quart casserole dish or a 9 x 13-inch baking dish.
2 Sprinkle the crumbs in a single layer on a baking sheet; bake 10-15 minutes or until golden brown; set aside.
3 Bring a large pot of salted water to boiling; cook the macaroni al dente (8-10 minutes); drain macaroni; then place in a large bowl.
4 Bring milk to a simmer in a small saucepan over med-high heat.
5 In a medium saucepan over med-low heat, melt the 6 tablespoons butter; add in the flour; mix well using a wooden spoon or spatula.