Bowl of cornstarch and cornstarch slurry.
The Best Substitute For Cornstarch Is Already In Your Pantry

With so many recipes calling for cornstarch, realizing you've run out can be alarming. Luckily, you can use all-purpose flour as a replacement.

If you're using flour as a thickening agent over cornstarch, you'll have to roast it with some butter to create a roux to eliminate its raw, unprocessed flavor.

In frying, cornstarch creates a crunchy exterior. Flour will create a thicker, fluffier coating with more bite to it.

When baking, you're better off not replacing cornstarch with all-purpose flour. The former works as a tenderizer, and flour will only mess with the texture.