Listen. DO NOT dump cornstarch directly into hot liquid. That’s a cry-for-help move. It will clump into sad, rubbery blobs of despair. We’ve all done it. We all cried.
You need a slurry. That’s just fancy talk for “mix cornstarch with cold water first.” Use equal parts cold water and cornstarch. So, for 1 tablespoon of cornstarch, use 1 tablespoon of cold water.
Whisk that slurry like you mean it. Then pour it into your simmering liquid while stirring like a maniac. It should thicken in about 30 seconds. If it doesn’t, give it a tiny bubble-boil. Patience, grasshopper.
The “Oops” Factor: Fixing Mistakes
Made it too thick? Add more liquid. Warm broth, milk, or water. Stir. Boom, problem solved. You didn’t break it, you just made more sauce.
Made it too thin? Mix another tiny slurry—like 1 teaspoon cornstarch + 1 teaspoon water—and stir it in. Don’t go nuclear. You can always add more, but you can’t take it out.
What if it went lumpy? Strain it through a mesh sieve. Pretend you meant to do that. Throw the lumps away. No one needs to know.
How to Thicken Sauce and Soup (Cornstarch Slurry) • Just One Cookbook
