Why is 2 minutes so critical? Because enzymes die at 180°F (82°C). Boiling water is 212°F, so it’s overkill—in a good way. You only need enough time to heat the squash’s core.
Think of it like a race: the squash’s center must hit 180°F for about 60 seconds. That’s it. Any longer, and you’re cooking it, not blanching it. You’re making squash mush, not freezer gold.
Here’s a quirky detail: yellow squash and pattypan squash are drama queens. They lose their crunch if you blink too long. Cube them first, then blanch for exactly 2 minutes. No more, no less.
The Final Countdown (Literally)
For a foolproof method, use a timer. Not a guess. Not a “oh, I’ll just stir for a bit.” Set it for 2 minutes and 30 seconds if you’re feeling rebellious, but don’t push it past 3.
One minute before your timer goes off, get your ice water ready. When that beep hits, you must act like a ninja. Scoop, drain, and plunge. Speed is your friend.
How To Blanch Squash at John Halliburton blog
And what about whole squash? Don’t even try it. Blanching a whole zucchini is like putting a sleeping bag in a washing machine. It takes forever and makes a mess. Cube or slice first. Always.
