Method.
Mix as for lemon jelly. Set aside in a cool place, and as soon as it becomes sirupy stir occasionally until quite thick. Then beat with wire spoon or whisk until frothy. Fold in the beaten whites, and continue to beat lightly until quite stiff. Pile by spoonfuls on a plate and serve with boiled custard, or mold as in Fig. 69.
Frozen mixtures.—There are some interesting principles to note here. The freezing is accomplished by using a mixture of chopped ice and rock salt. Can you explain how this reduces the temperature?
Another interesting point is this: Have you ever seen a milk bottle on a cold winter morning with the paper cover or even the metal cap pushed up, the frozen milk standing high above the top of the bottle? What does this suggest to you in connection with the filling of the ice cream freezer?
It must be noted, too, that a larger amount of flavoring material is needed in a frozen dessert than in one that is not. The frozen custard, for instance, needs more vanilla than one prepared in the ordinary manner. Can you account for this?
Method of freezing.
There are many patterns of ice cream freezers that are well constructed and inexpensive. They are sold by the size, a 2 quart
freezer giving you 2 quarts of the frozen cream. See that the crank is oiled and the whole apparatus clean. Have ready pounded ice and rock salt, usually in the proportion of 1 part salt to 3 of ice. Machines come for cutting the ice, but it is easy to pound it in a strong bag. Set the freezer can in place, put around it the ice and salt alternately, shaking down and packing firmly. Have the ice cream mixture cool, pour it in, having the can not more than 2⁄3 full. Put on the lid, cover with ice and salt, and begin to turn the crank. Open and stir down once or twice, being careful to keep out the salt. Take out the crank before the cream is too stiff. Pack the cream firmly down in the can. See that the melted water is removed from the pail, put in more ice and salt, and leave until the ice cream is firm.
To mold ice cream or mousse. Directions for packing in a mold are given under strawberry mousse.
14. American ice cream.