How to Use an Oven Bag

The bag creates a sealed environment. Because the steam inside cannot escape, the food cooks in its own juices; meat and poultry become tender without drying out, and vegetables retain their moisture and color. The oven stays clean, too, because splattered oil and liquid collect inside the bag. On the other hand, a crust does not form inside the bag: the surface stays moist and does not brown. If you want a crisp top, cut the bag open during the final stage of cooking. The bag also reduces cleanup time by keeping the oven clean.

The steps are straightforward. Place the ingredients in the bag; if desired, add a tablespoon of flour and shake the bag. The flour helps the sauce thicken and reduces sticking. Close the bag with its clip or a heat-resistant tie; if using a twist tie with a metal wire, do not remove its plastic coating. Make a few small slits in the top with the tip of a knife. Without slits, steam can build up inside the bag, causing it to inflate and possibly burst. Space the slits apart across the top of the bag.

Placement is half the safety equation. Put the bag on a baking sheet with raised edges so any leaks do not run onto the bottom of the oven. Leave enough room above it to expand without touching the rack, and keep it away from the oven walls, top heating element, and fan. The bag can melt if it touches them. Do not use an oven bag under the broiler. Keep the temperature below the limit printed on the package; most bags can be used up to about 200°C / 390°F. Adjust the bag once on the baking sheet before putting it in the oven.

Check doneness through the bag. Since the bag lets you see the food, you can watch its color and how much it rises. If you need to measure the internal temperature, insert the thermometer through the bag and keep the opening small. When cooking poultry, the thickest part should reach 74°C / 165°F. For a browned top, cut open the top of the bag with scissors during the last 10–15 minutes of cooking and fold back the edges. Do not remove the bag completely; the sauce underneath should stay in the pan.

Take care when opening the bag. Steam built up inside rises as soon as it is cut and can cause burns. Keep the bag on the baking sheet, point it away from yourself, and cut it with scissors while holding your arm outstretched. Strain the sauce from the bag into a serving bowl. The bag is single-use; do not wash it and use it again. An oven bag does the same job as a lidded Dutch oven or a dish covered with foil; it is a good alternative if neither of the two alternatives is available, but it is not enough on its own for a dish that needs a browned top. Use tongs to transfer the food from the bag to a serving plate.