Preheat oven to 325° F
Rinse turkey breast and pat it dry with a paper towel.
Place the turkey breast, skin side up, on a rack inside a roasting pan.
In a small bowl, combine 3 Tbsp melted butter, 1 tsp salt, ½ tsp dried thyme leaves (crushed), ½ tsp onion powder, ¼ tsp garlic powder, and ¼ tsp pepper. Mix well.
Loosen skin from the turkey and brush half of the butter mixture on the flesh;
smooth the skin back over the turkey and secure with a toothpick.
Brush remaining butter mixture over the turkey skin.
Pour 1 1/2 cups chicken broth into the bottom of the roasting pan.
Roast the turkey at 325 degrees F for 1 hour 30 minutes (or until turkey reaches 160 degrees F). Baste the turkey occasionally with the juices from the pan.
Remove from oven, cover the turkey and let it rest for 10 minutes before carving.