Whisk egg yolks and sugar in a mixing bowl until creamy and white Heat cream and milk in heavy saucepan. Pour over egg yolk mixture and mix well. Stir in vanilla extract.
Pour mixture in saucepan. Heat slowly over low heat while stirring until mixture coats the back of a spoon, about 8 to 10 minutes. DO NOT LET BOIL. Cool completely in refrigerator.
Freeze according to manufacturers instructions.