Step 1: Preheat the Oven

Set your oven to 350°F (175°C). Position the rack one level below the center for optimal airflow and even cooking.

Step 2: Prepare the Butter Mixture

In a bowl, combine the softened butter, minced garlic, salt, pepper, and dried herbs. This mixture will add rich flavor and moisture to your turkey.

Step 3: Prep the Turkey

• Remove the neck and giblets from the turkey cavity.
• Tuck the wings under the turkey or tie them back to prevent burning.
• Generously rub the butter mixture over the entire turkey, ensuring every nook and cranny is coated.

Step 4: Prepare the Plastic Bag

• Sprinkle 1 tablespoon of flour inside the plastic oven bag. This helps prevent the bag from bursting during cooking.
• Add the chopped onion, carrots, and celery into the bag for extra flavor.

Step 5: Bag the Turkey

Carefully place the seasoned turkey inside the bag with the vegetables. Seal it tightly, then use a sharp knife or scissors to make a few small slits on top. These will allow steam to escape while locking in moisture.

Step 6: Roast

Place the bagged turkey into a large roasting pan. Cook according to the turkey’s weight:

• 12–15 lbs: Roast for 2 to 2.5 hours
• 15–20 lbs: Roast for 2.5 to 3 hours
• 20–24 lbs: Roast for 3 to 3.5 hours

Use a meat thermometer to ensure the thickest part of the thigh reaches 165°F.

Step 7: Rest and Serve

Once cooked, let the turkey rest in the bag for about 20 minutes to allow the juices to settle. Carefully remove the bag, transfer the turkey to a serving platter, and carve it up for your hungry guests.