Mix all of the ingredients in a 9 x 13 baking dish and bake at 350 for 15 minutes. That's it. It's THAT easy!!!
For a variety I have occasionally added 2 links of cooked andouille sausage into the dish for a spicier kick and heartier meal.
Most home cooks commit the error of throwing frozen shellfish directly into a hot butter bath without proper thawing, releasing excess water that breaks the emulsion. Managing moisture is vital when combining shrimp and scallops in a single vessel. Scallops naturally hold significant internal water, which escapes during the initial minutes in the oven at 350 degrees Fahrenheit. Patting both proteins completely dry with paper towels before mixing them with salted butter prevents a watery sauce.
Freezing and Reheating Mechanics
Assembling this dish ahead and freezing it unbaked requires careful attention to food safety and texture. Raw shrimp and scallops can be combined with minced garlic, lemon juice, and Cajun seasoning inside a foil baking pan, then frozen for up to one month. Thaw the container overnight in the refrigerator before baking. Reheating leftovers demands low heat to avoid toughening the delicate seafood. Place portions in a skillet over medium-low heat for roughly four minutes, stirring gently until warmed through, rather than using a microwave that overheats the proteins and makes them rubbery.
Fresh Versus Preserved Components
Using fresh seafood yields a firmer bite because frozen alternatives often absorb moisture during commercial processing. Dried parsley behaves differently than fresh herbs when exposed to high heat; dried flakes release earthy notes slowly into the fat, whereas fresh chopped parsley added during the final minutes retains a bright color and herbaceous punch. Adjusting the salt levels requires caution if using salted butter alongside commercial Cajun seasoning blends, as sodium concentrations vary widely between brands.