Turn on broiler/grill and melt butter in a 13x9-inch broiler pan.
Remove pan from oven and stir in BBQ sauce and lemon juice.
Add shrimp and toss to coat. Spread out in pan.
Sprinkle cayenne, black pepper, and garlic powder over the shrimp.
Broil five inches from the heat source for four minutes. Turn shrimp. Add sherry and broil for four minutes longer.
Calories: 384kcal | Carbohydrates: 12g | Protein: 42g | Fat: 15g | Saturated Fat: 3g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 5g | Cholesterol: 311mg | Sodium: 1369mg | Potassium: 297mg | Fiber: 0.02g | Sugar: 7g