Materials:
4 egg yolks, 2 cups of sugar, 2 boxes of milk, 1 box of Nestle cream, 4 bags of Nestle instant black coffee.
Practice:
1. Beat egg yolk and sugar until white, add milk and mix well. Boil over low heat until the heat is off (do not boil).
2. Add cream and coffee and stir well. Let cool.
3. The ice cream juice had better be no more than 3 centimeters thick, otherwise the freezing speed is slow and the ice cream is easy to be rough and affect the taste.
4. First, set the refrigerator freezer to strongly cool and precool for 1 hour, put the ice cream juice in the freezer and refrigerate it below 5 degrees, then move it into the freezer for 2-4 hours to freeze the semi-condensed ice cream, stir it and put it back into the freezer to make the ice cream more meticulous. If there is a crushed pulp or drupe, avoid precipitating to the bottom, especially if you take out and stir it halfway, and then freeze it.
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