Begin by bringing a large pot of salted water to a boil and add 1 pound of pasta. Cook according to package instructions until al dente, about 8-10 minutes, then drain and set aside.

In a large skillet over medium-high heat, add 1 pound of ground beef and cook until browned, about 6-8 minutes.

In a saucepan, melt 4 tablespoons of butter over medium heat. Whisk in ¼ cup of flour, then gradually whisk in 2 cups of milk, cooking until thickened.

In a mixing bowl, combine the cooked pasta, browned beef, 8 ounces of crispy bacon, and about 1 cup of BBQ sauce. Pour in the cheese sauce and stir until well mixed.

Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish. Pour in the pasta mixture and spread evenly.

Bake for approximately 25-30 minutes or until the top is bubbly and golden brown.