A dinner pot roast is a great meal any time, though it makes delicious way to soothe a stressful day or relax during dreary weather. There are many variations of pot roast, some including various spices and vegetables. No matter your taste preference, a pressure cooker is a hassle-free way to cook a pot roast.
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Set your beef chuck roast out to defrost if frozen. If you are purchasing the roast from a grocery store and don't need to cook it for a day or two, place it in the refrigerator instead of the freezer to keep from having to defrost it for several hours. Do not place the roast in the microwave to defrost.
Pour the vegetable oil into the pressure cooker with the heat on medium high. Keep the lid open and allow the oil to heat up. Put the beef chuck roast in the pressure cooker to brown on each side. This process is called searing and it helps keep the roast moist and preserve the juices. You can also brown the roast in a skillet.
Mix together all of the seasonings, including the Italian dressing mix, ranch dressing mix and the package of brown gravy. If you do not like Italian and ranch dressing or prefer a more natural taste, eliminate the Italian and ranch dressing mixes in favor of a package of dry onion soup mix. Pour these mixtures over the roast and then add your diced onion and can of beef broth. Water can be added, but is optional and will deter from the full flavors of the seasonings.
Put the lid on the pressure cooker and seal it. Cook the pot roast over high heat. This will build pressure inside of the chamber and eventually cause it to make a whistling or beeping sound. When this occurs, change the heat from high to medium and allow the roast to cook for 45 minutes. Turn the heat off and remove the pressure cooker to allow it to stand at room temperature for approximately 5 minutes. Remove the lid carefully, as the pressure will be thick inside of the pressure cooker. To help alleviate this, run the cooker under cold water before opening.
Place the pot roast on a decorative plate with some of the juices. Pour the remaining juice into a small bowl and add your flour to thicken it up into a dipping gravy. Place the gravy beside potatoes or rolls for a rich taste.
Add chopped potatoes, carrots, celery and mushrooms to the roast before cooking for a complete meal.