Ice Cream Making Method Base On Custered

Mix your base.
A custard base is made with egg yolks. It's creamier and richer-tasting than the cream base (although both also use heavy cream). A custard base creates ice cream that's similar to gelato, and it tastes delicious with any type of flavoring or mix-in. To make the base, beat these ingredients in a bowl:
4 egg yolks
1/2 cup sugar
Optional:
 add 1/2 cup cocoa powder for chocolate ice cream
Bring 1 cup of milk to a gentle simmer. Don't let it boil - just heat it over medium heat until the edges begin to bubble.

Stir the hot milk into the egg mixture. Use a wire whisk to whisk constantly as you slowly pour the milk into the egg mixture. Pouring it too quickly could result in scrambled eggs!
Pour the mixture back into the saucepan and heat it. Stir it constantly over low heat until the mixture thickens and will coat the back of a spoon when you lift it from the saucepan. It should take about 8-10 minutes to thicken, and if you check the temperature with a thermometer it should read between 165 and 180 degrees Fahrenheit.This thickened mixture is custard.
Make sure the mixture doesn't boil. 
If it boils it will curdle and clump. If this happens, pour it into a blender and puree it until it's smooth again.
Chill the custard. Pour it into a bowl, cover it, and chill it in the refrigerator until it's completely cool.
Add 1 cup heavy cream and mix-ins.
 Finish the base by adding a cup of heavy cream and stirring well. Your custard base is now ready for the ice cream maker! Before you freeze it, add a cup or more of any of the following mix-ins:
2 teaspoons vanilla
1 teaspoon almond extract
1/2 teaspoon peppermint extract (for mint chocolate chip ice cream)
Sliced strawberries, cherries, plums or peaches
Chopped chocolate bar or candy bar
Butterscotch chips
Shredded toasted coconut
Peanut butter or almond butter
Candied pecans
Chopped pistachios
7Freeze the ice cream in an ice cream maker. Pour the chilled mixture into your ice cream maker and freeze it according to the manufacturer's instructions.