Why Is My Green Bean Casserole Runny?
Green bean casserole may become runny if it is overcooked or if too much liquid is added, such as water or cream. Additionally, the casserole may be runny if the beans are not drained well, or if the sauce has not thickened properly. To fix a runny green bean casserole, try reducing the amount of liquid in the recipe, adding a thickening agent such as flour or cornstarch, or baking the casserole for less time.