Smoky Texas-Style Ribs with Baked Mac & Cheese

Ingredients:
For the Ribs:

2 racks of baby back ribs (about 4 lbs total)
2 tbsp olive oil
1 tbsp smoked paprika
1 tbsp brown sugar
1 tbsp garlic powder
1 tbsp onion powder
1 tsp cumin
1 tsp cayenne pepper (adjust for heat preference)
Salt and pepper, to taste
1 cup BBQ sauce (store-bought or homemade)
For the Baked Mac & Cheese:

8 oz elbow macaroni
2 tbsp butter
2 tbsp all-purpose flour
2 cups milk