Question: how long do you blanch zucchini squash for?
Answer: Blanch the squash by steaming or boiling them for about 3 to 5 minutes (less time if grated). I use an inexpensive metal steamer, but you can also just plop it straight into boiling water. This destroys the enzymes and bacteria that would, over time, remove nutrients and flavor from the squash. Cool the squash.