Creamy Beef & Noodles with Mushrooms

instant pasta [durum semolina (enriched with niacin, ferrous sulfate, thiamin mononitrate, riboflavin, and folic acid)], sour cream powder (cream solids, cultured nonfat milk, citric acid), freeze-dried cooked beef, salt, potato starch, parmesan cheese powder (partially skim milk, cheese cultures, salt, enzymes, disodium phosphate), whey powder, sliced mushrooms, tomato flakes, butter flavor (whey solids, enzyme-modified butter, maltodextrin, salt, dehydrated butter, guar gum, annatto, and turmeric), onion granules, low sodium sea salt (sodium,chloride, potassium), garlic granules, instant nonfat milk powder, minced green onion, basil, white pepper, black pepper.