In lidded plastic container large enough to hold drumsticks, combine seasoning, bay leaf, hot sauce, & buttermilk. Stir well. Add chicken, turning to coat, cover with lid & refrigerate several hours, or overnight. When ready to cook chicken, preheat oven to 400. Remove chicken from refrigerator. Drain chicken, ( do not rinse) pat dry with paper towels. Place flour. salt & pepper in plastic, sealable 1 gallon size bag. Add chicken drumsticks in batches & shake bag thoroughly to coat. Put butter in roasting pan & place in oven. When butter is melted & pan is hot,add chicken, SKIN side down,to pan. Place in oven & cook 20 minutes. Lower the temperature, to 350, turn drumsticks & cook another 20 minutes, or until cooked through. Remove coooked drumsticks to paper towel- lined plate to drain.