Adapted from Cooks.com to include ingredient quantities and add additional tips. A 4-quart pressure cooker can handle up to 2 1/2 pounds of country-style ribs, and a 6-quart model can handle 5 pounds. Read manual for pressure cooker to double check amount of liquid needed. According to USDA, 1/2 pound of raw country-style ribs is one serving, but most people will insist on 1 pound per person. Cooking time allows for build up of steam, cooking, and natural cooling down. Nutrition data exaggerates fat and sodium, as long as sauce is discarded after ribs are served.