For most sauces, gravies, and fruit pie fillings, the standard ratio is 1 tablespoon of cornstarch for every 1 cup of liquid. That’s it. That’s the starting line.
This gives you a medium-thick finish. Think pouring gravy, not spreading wallpaper paste. It’s the sweet spot for silky stir-fry sauces or a cozy pot pie filling.
Now, before you panic-measure, remember: not all liquids are created equal. A thin broth? Stick to the 1 Tbsp per cup rule. A heavy cream base? You might get away with a little less, maybe a heaping teaspoon.
What About a Thicker, Gloopier Situation?
Want a pudding that holds its shape? Or a lemon meringue pie filling that won’t collapse? Go for 2 tablespoons per cup. You’re entering “spoon-standing-up” territory.
Don’t go over 2 tablespoons per cup unless you’re making literal play-dough. Seriously. Three tablespoons per cup is for homemade gummy bears, not dinner.
And for thin soups that just need a hint of body? Try 2 teaspoons per cup. It’s a whisper, not a shout. You’ll barely notice it, but your mouth will thank you.
How to Thicken a Sauce With Cornstarch