I am making ice cream with an inexpensive electric machine that uses a dasher. For a test I put 2 quarts of water in the inner pot. Then I added 8 trays of ice to the space between the inner and outer pots. I am figuring 5 part ice to 1 part rock salt. How do I combine the ice and rock salt for the most uniform cooling?

I tried combining the ice and salt before putting the mix in the machine but that did not work.

  • 3
    Are there instructions for your machine? What is the brand and model? Jun 4, 2021 at 17:02
  • 1
    I am somewhat confused about what your question is. The one sentence that is formulated as a question is "how do I combine the ice and rock salt for the most uniform cooling". What options are there besides "pour both into the outer pot"? How did it "not work" when you combined them before putting them into the machine?
    – rumtscho
    Jun 4, 2021 at 17:23
  • 2
    I think the concept I was missing is "packing the pot". Such layering creates "salt water slush". This make sense to me because it distributes the salt and ice to achieve the needed temperature reduction. I found this page very helpful: texascooking.com/features/june2004icecreamfreezers.htm
    – Mike
    Jun 5, 2021 at 3:46
  • 2
    Mike, if you figured out the solution, you can help others with the same issue by posting an answer to your own question.
    – csk
    Jun 6, 2021 at 17:02
  • 4
    Water is not a good test of an ice cream machine. Pure water freezes very differently from ice cream custard. If you're going to test with anything, use whole milk.
    – FuzzyChef
    Jun 6, 2021 at 18:56

1 Answer 1


Ice and Salt Chart

Here is the chart that was included in the instructions in Mike's link. It suggested layering the ice to 3-4 inches deep and then adding 5oz of rock salt or 3oz of table salt and repeating until the bucket is full to the brim. Adding a cup of cold water at the halfway mark and again when the tub is full is recommended to help the ice settled and keep the motor from binding.

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