How to Make Slow Cooker Chili: Brown the chicken, garlic, fresh jalapeno, and onions first, then toss everything but the beans and milk into the slow cooker or crock pot on low for 6 hours. Add the beans and milk at the end. If you are using already cooked chicken, add that towards the end of cooking, too, just long enough to warm it up. With some simple adjustments to the recipe, you've got a delicious and healthy crockpot chicken white chili waiting for you when you get home!