1
Melt butter over medium-high heat, then add shrimp and Old Bay seasoning
2
Cook for 3-4 minutes on both sides until cooked through. Add in the crab and stir.
3
To make cheese sauce, melt butter and whisk in flour in stages to prevent clumping.
4
Add the milk and heavy whipping cream and stir. Add half of the shredded cheese and the 4 ounces of cream cheese stir until the cheese is melted.
5
Add the onion powder, salt, and pepper to taste. Taste repeatedly and adjust seasonings as needed.
6
Place cooked pasta in a large pot. Drizzle the cheese sauce over the pasta and stir until fully combined.
7
Add in the cooked seafood and the butter sauce the seafood was cooked in.
8
Layer in pasta and cheese to a 9x13 baking dish, then bake for 25-45 minutes at 375 degrees F, until cheese is melted and bubbly.