Butter blanket is using a cheesecloth, you will need a 4 layer of cheesecloth that is big enough to cover your turkey. You dip that in melted butter, squeeze all excess butter and cover your turkey with it before putting it in the oven. You keep on basting the cheesecloth with any excess butter or the drippings in the pan. I follow this recipe and it turns out amazing each and every time: https://www.foodnetwork.com/recipes/food-network-kitchen/butter-blanketed-turkey-7182863

Apparently access is denied to the food network website, lol, so just copy and paste the link to open in another browser.