It was boiling milk with sugar, carbonate and vanilla for 15 minutes, it takes 1 cup milk and beat with the buds, is added through a strainer to milk this while boiling and will move during cooking 10 minutes over a low heat. He retired from heat and shake while a space of 10 minutes.
For this operation is preferable to use a flat wooden spoon. Allow cooling, he adds diluted butter and whipped cream. Will be put in the freezer or if you want thinner in a refrigerator, putting around the container where is the layer of ice cream 1 chopped, another bulk salt 1 ended with ice: it will harden laps until the cream.