In a mixing bowl, combine softened unsalted butter with fresh rosemary, fresh thyme, kosher salt, and black pepper. Mix vigorously until all ingredients are fully blended, creating a smooth and aromatic herb butter.

Take your skin-on, bone-in turkey drumsticks and generously rub the herb butter all over each leg. Ensure even coverage, massaging the butter into the skin for maximum flavor infusion.

Place the seasoned turkey legs on a wire rack set on a baking tray. Tightly wrap the legs with aluminum foil to lock in moisture during cooking.

Preheat your oven to 300°F (150°C). Once ready, place the wrapped turkey legs in the oven and let them roast for approximately 2 hours and 20 minutes.

After the slow cooking phase, carefully remove the foil and switch your oven to the broil setting. Return the turkey legs to the oven for an additional 8-10 minutes.

Once the skin is beautifully crisped, take the turkey legs out of the oven and let them rest for a few minutes.