Cooking Times - As a general rule, when cooking beef roasts in a pressure cooker, assume 20 minutes of cook time for every pound of meat. If you have a thicker cut of meat, it may take longer to cook in the pressure cooker. If you are in a rush, cut your roast in to smaller chunks.Serving Suggestions:This shredded meat can be served up inside of tacos, burritos, on nachos, or in salads. Each are so so delicious. Here are a few suggestions: