1. Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper or lightly grease it to prevent sticking.
2. If using store-bought biscuits, split them in half horizontally and arrange the bottom halves on the baking sheet. For homemade biscuits, bake according to your favorite recipe and then split once slightly cooled.
3. In a medium bowl, combine the chopped shrimp, crab meat, mayonnaise, Dijon mustard, Old Bay seasoning, lemon juice, minced garlic, and green onions. Gently fold the ingredients together to keep the seafood pieces intact.
4. Season the mixture with salt and pepper to taste. Remember, the seafood and seasoning already add saltiness, so taste before adding more.
5. Spoon an even layer of the seafood mixture over each biscuit bottom, then sprinkle shredded cheddar cheese generously on top.
6. Place the biscuit tops over the cheese layer, pressing gently to secure the filling.
7. Brush the melted butter over the biscuit tops, which helps them brown beautifully and adds extra flavor.
8. Bake in the oven for 12-15 minutes, or until the biscuits are golden brown and the cheese has melted. You’ll know it’s ready when the tops are slightly crispy and the filling is bubbly.
9. Remove from the oven and let cool for a few minutes before serving. This step helps the filling set slightly, making the melts easier to eat.

From personal experience, I’ve found that using fresh seafood makes a noticeable difference, but if you’re pressed for time, pre-cooked shrimp and good-quality crab meat work wonders. I also like to add a little extra garlic when my family’s around—they adore that punch of flavor.