Preheat the oven to 450°F (232°C).

In a large mixing bowl, whisk together flour, baking powder, garlic powder, and salt.

Cut in the cold butter using a pastry cutter or your fingers until the mixture resembles coarse crumbs.

Stir in the shredded cheddar cheese until evenly incorporated.

Pour in the buttermilk and gently mix until just combined.

In a separate bowl, mix crab meat, mayonnaise, Dijon mustard, and lemon juice until well combined.

Fold the crab mixture gently into the biscuit dough until just combined.

Scoop the dough onto a greased baking sheet in tablespoon-sized portions, forming rough mounds.

Bake for 12-15 minutes or until golden brown and cooked through.

While biscuits bake, prepare the lemon butter sauce by melting butter in a saucepan over low heat and stirring in lemon juice and parsley.

Once the biscuits are out of the oven, brush the tops with the lemon butter sauce before serving.