Prep the drumsticks: Pat the chicken dry with paper towels.
This helps the skin crisp. If there’s excess skin or loose fat, trim it.
Preheat your oven: Heat to 425°F (220°C). Line a baking sheet with foil and set a wire rack on top for better air circulation.
If you don’t have a rack, lightly oil the foil.
Make the garlic butter: In a small bowl, whisk melted butter, olive oil, minced garlic, lemon zest, lemon juice, parsley, paprika, onion powder, salt, pepper, and red pepper flakes if using.
Coat the chicken: Place drumsticks in a large bowl. Pour about two-thirds of the garlic butter over them and toss to coat evenly. Reserve the remaining butter for basting.
Arrange and bake: Place drumsticks on the rack, leaving space between each piece.
Bake for 20 minutes.
Baste and finish: Brush the drumsticks with the remaining garlic butter. Bake another 15–20 minutes, until the skin is deeply golden and an instant-read thermometer reads 165°F (74°C) at the thickest part, not touching the bone.
Crisp under the broiler (optional): If you want extra-crispy skin, broil for 1–2 minutes, watching closely to avoid burning.
Rest and serve: Let the chicken rest 5 minutes so the juices settle. Garnish with fresh parsley and serve with lemon wedges.