How to Make a Faux Pastry Bag
If you want to make a recipe requiring simple piping—but you don’t own a pastry bag and tips, a zipper-lock bag can be fashioned into a substitute.
If you want to make Paris-Brest (related)—or another recipe requiring simple piping—but you don’t own a pastry bag and tips, a zipper-lock bag can be fashioned into a substitute. For Paris-Brest, you’ll need two bags, one with a ¾-inch-wide opening (to approximate the star tip) and another with a ½-inch-wide opening (to approximate the round tip).