I have made one batch of ice cream, and now I need to make another. I have rinsed out the freezer bowl, and when I dried it I noticed that the water had frozen to a thin film of ice. So it is obviously still pretty cold. I am hoping to finish the second batch tonight (at the time of writing it is 7 pm here in Sweden). Is a couple of hours in the freezer enough, or do I need to wait until tomorrow morning?
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Try it. The worst that can happen is you have to melt and re-freeze the next morning. – Computerish Dec 30 '10 at 18:32
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Salt and ice rules here (at least in the "not mechanically refrigerated and under $100" class.) Second batch is easy-peasy, no waiting. – Ecnerwal Jul 1 '15 at 2:34
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This really depends on your freezer and your icecream bowl. Usually the instructions will have a suggested freeze time on them...In my experience, however, it's usually 6-8 hours at a minimum.
If you need to make multiple batches, it is ABSOLUTELY worth your money to get another bowl.
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The goal is to get the whole bowl down to the coldest temperature possible...even though the bowl is at -1 C (it will freeze water) it would be ineffective to freeze more ice cream. 2 bowls is the only reliable way to do two batches, although pre-chilling the ice cream mix in the freezer to near freezing will help. – Doug Johnson-Cookloose Dec 30 '10 at 20:12
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@doug: On labor day I saw people try and do two batches, freezing the bowl for 6 hours in between, and the second batch never froze up, not even close. So I agree completely. – Satanicpuppy Dec 30 '10 at 20:27
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It also depends on the ambient temperature and how well-chilled your ice cream is before freezing. You can get away with a lot more if your place is cool and you chill the custard in the freezer to the point of almost starting to freeze. – Cascabel♦ Jul 7 '15 at 6:11