Cook the shrimp: Melt 2 tbsp of butter in a large pan or skillet. Add the garlic and sauté until fragrant for about 30 seconds to 1 minute. Add the shrimp, season with salt and pepper to taste and sauté for and additional 1-2 minutes on one side just until begins to turn pink, then flip.
Form the sauce: Pour in wine (or broth), add red pepper flakes. Bring to a simmer for 1 to 2 minutes or until the wine reduces by about half and the shrimp is cooked through (don't over cook your shrimp).
Finish the scampi: Stir in the remaining 2 tbsp butter, lemon juice and parsley. Remove from heat immediately.
Serve: Serve over rice, pasta, garlic bread or steamed vegetables.
