I have a cookie recipe that calls for 1/4 cup of lemon zest. Can I substitute dried lemon peel, and how much? Or should I use lemon extract, how much? Or would it change the consistency of the cookie?
I would definitely use lemon extract over dried lemon peel. According to eHow, use half as much lemon extract. That seems like a lot, but then 1/4 cup of zest is also a lot, and I don't know your recipe so use your best judgement.
You could also use a bit of each. The downside is that extract is VERY strong, and peel can be a bit gritty once it's dried.
Fresh is best, no question. If you want to substitute, use one third to one half the amount of dried peel for the zest (that depends upon the brand and age of the dried peel). I'd rehydrate the peel with a bit of lemon juice if you can or water. The substitution will affect the texture of the final cookie, and I'm afraid not for the better. Rehydrating the dried peel will help a bit with that.