The crock pot chicken alfredo is thickened with arrowroot powder. A little bit goes a long way. Tossing the chicken with the arrowroot before cooking gives it the best texture. However, after the noodles are cooked if you think there’s too much liquid, you can add one more teaspoon by removing some of the hot water and whisking in the arrowroot powder. Then, allow the meal to simmer for a few minutes.