Step 3: Create the Steam
Cover oysters with a soaking-wet burlap sack or thick beach towel. Cook oysters 8 to 10 minutes. (The shells will open about ¼ to ½ inch.) If you prefer lightly steamed oysters, stick to the lower end of the time range. Transfer the oysters with a clean shovel or large metal dustpan to a newspaper-lined table. Allow the metal to reheat; then repeat the procedure with more oysters, adding more wood as needed.