1. Preheat oven to 350ºF. Rinse chickens inside and out; pat dry thoroughly.
2. Mix paprika, onion powder, garlic powder, thyme, salt and pepper. Rub chickens (inside and outside) with spice mixture.
3. Pour about 2 oz. beer out of each can. Set cans upright in a roasting pan large enough to hold both chickens without touching. Set chickens so that cans fit inside cavities, legs facing down. Roast chickens until juices run clear, about 1 hour 15 minutes, basting after 30 minutes.
4. Carefully remove chickens from beer cans and let rest for 10 to 15 minutes. Carve into portions and serve.