Many recipes use cornstarch, most commonly as a way to thicken up sauces or other recipes that needs thickening. It should be considered a staple in most kitchens, because it does get Hughes quite regularly.
However, if you have a recipe calling for cornstarch and you don’t actually have any on hand to be able to use, there is a substitute that will work not quite as well as cornstarch but is good enough to be used in a pinch.
For each tablespoon of cornstarch that your recipe calls for, used 2 tablespoons of flour instead. This will cause some thickening that is needed in your recipe, but obviously it won’t be as good as if you had used actual cornstarch. But if you need to have a substitute for cornstarch in an emergency this is a great way to do it.