The Pioneer Woman (Ree Drummond) Crockpot Broccoli Cheddar Soup Recipe. Looking for recipes and ideas for weeknight dinners and meals? Soups are perfect comfort food for cold weather! This vegetarian broccoli cheese soup cooks in a crock pot or slow cooker. So easy, and a lot like the one they serve at Panera! Low carb and so delicious. You'll need frozen broccoli, chicken stock, onion, carrots, cream of celery soup, seasoned salt, velveeta, sharp cheddar cheese.