– 1 pound macaroni or shells – 6 slices thick-cut bacon, sliced lengthwise then cut into 1/4"-1/2" pieces – 1 small white onion, diced – 2-3 jalapenos, deseeded and membranes removed, diced (optional) – 1 pound cooked beef brisket, fat trimmed and cut roughly chopped – 3/4 cup your choice of barbecue sauce – 1/2 cup (1 stick) butter, salted or unsalted – 1/2 cup all-purpose flour – 2 cups whole milk – 1 cup heavy whipping cream – 2 teaspoons garlic powder – 2 teaspoons mustard powder – 2 teaspoons onion powder – 1 teaspoon ground black pepper – 16 ounces smoked cheddar, shredded – 8 ounces sharp cheddar, shredded – 1 cup crispy onion, crushed