Melt 4 tablespoons of butter in a medium saucepan over low heat. Stir in 1 teaspoon of smoked paprika, ½ teaspoon of garlic powder, salt, and pepper to taste. Allow to bubble for about 2 minutes and then remove from heat.

If using precooked king crab legs, gently crack shells and remove the meat, breaking it into bite-sized pieces. If fresh, steam until heated through, about 5-7 minutes, then add to a mixing bowl.

In a skillet, add some garlic butter sauce over medium heat. Toss in prepared crab meat and heat for about 3-4 minutes, ensuring it remains tender.

Remove the skillet from heat, stir in the chopped herbs and squeeze in lemon juice. Mix well to combine all flavors.

Set oven to broil. Place brioche buns cut-side up on a baking sheet and broil for about 1-2 minutes until golden. Watch closely to avoid burning.

Assemble by spooning crab mixture into toasted buns, drizzling with remaining garlic butter before serving immediately.