Pat the shrimp dry with paper towels.
Season the shrimp with a pinch of salt and pepper.
Preheat your grill to medium-high heat. Aim for a smokin' hot grill!
Place the seasoned shrimp directly on the grill grates.
Grill for 2-3 minutes per side or until the shrimp are opaque and have a nice grill mark. Be careful not to overcook.
In a large skillet or pan, melt 1/4 cup (half stick) of butter over medium heat.
Add minced garlic and red pepper flakes (if using). Sauté for 1-2 minutes until the garlic becomes aromatic.
Pour in the white wine or chicken broth to deglaze the pan, scraping up any browned bits from the bottom.
Let it simmer for another 2 minutes to allow the alcohol to cook off.
Add the remaining 1/4 cup of butter to the skillet, allowing it to melt and incorporate into the sauce.
Stir in the lemon juice and chopped parsley. Season with salt and pepper to taste.
Add the grilled shrimp to the skillet, tossing them in the flavorful scampi sauce until well-coated. Let them soak up the goodness for a minute or two.
Transfer the shrimp and sauce to a serving platter.
Garnish with additional fresh parsley and a squeeze of lemon juice if desired.