Melt the butter in a pan over medium heat.
Add the minced garlic and sauté until fragrant.
Stir in the lemon juice, smoked paprika, cayenne pepper, and Old Bay seasoning.
Pour in the seafood broth or white wine and mix well.
Add Worcestershire sauce and brown sugar (if using).
Sprinkle in the crushed red pepper flakes, salt, and black pepper to taste.
Simmer for a few minutes until the sauce thickens slightly.
Remove from heat and garnish with fresh parsley.
Serve warm with seafood or as a dipping sauce.