Last nights dinner included yellow squash and it was bitter. My wife thinks it's due to them having gotten frosted a few days ago.

Is she correct? Dose squash get bitter if it's been frosted?

Most likely it was the frost.

https://www.gardeningknowhow.com/edible/vegetables/squash/bitter-tasting-squash.htm

mine are only Buttercup so the'Re Always Sweet

I've had bitter squash stringy and yellow from wal fart Once

Thanks looks like she was right. Normally I have already pulled the yellow squash out by now. But this year she sold a few CSA shares and replanted after squash beetles took out the first planting.

Well we stager planted a lot of things this year. Its amazing to be able to supply yourself but add 5 other families and know you could double or triple that if you had time is a great feeling.