Prepare the ingredients

• Chop the sausage into chunks.
• Husk the corn and cut the cobs in half.
• Scrub the mussels and debeard them.

Season the boiling water

• Bring a large pot of water to a boil.
• Stir in the Cajun seasoning, onion powder and Old Bay.

Boil the seafood and corn

• Add the crab legs, corn and sausage to the seasoned water.
• Add the mussels and shrimp and cook until the shrimp are pink and the mussels open.

Make the butter dipping sauce

• Melt the butter in a small saucepan.
• Stir in the garlic powder, onion powder and Old Bay.

Drain and serve

• Drain the pot into a colander.
• Serve the seafood boil with the butter dipping sauce and the Caesar salad.