Seafood boil sauce is what takes a pot of seafood from good to unforgettable. The combination of butter, garlic, Cajun seasoning, and spices creates that bold, buttery sauce everyone ends up dipping everything into. Growing up with Louisiana and Mississippi roots, I've eaten my fair share of seafood boils, and this is the kind of sauce that gets poured over shrimp, crab legs, potatoes, corn, and honestly anything else on your plate.