Seafood mac and cheese is here. Learn how to make seafood mac and cheese with shrimp and crab. It's an easy baked mac and cheese recipe. Recipe: 1-2 lbs. seafood 1 Cup Sour Cream 2 Tbsp. butter or margarine 2 Cups milk 1 Tsp dry mustard 1 lb. cheese (your choice) 1/2 lb. uncooked macaroni pasta Dash of nutmeg, pepper Onion powder, garlic powder, and seasoned salt Preheat oven to 375 degrees