Ice cream Custard (for Homemade Ice Cream)

2 1/4 cup sugar
1/2 tsp salt
6 Tbsp flour
1 quart cream
6 eggs
3 tsp vanilla
5 cups milk
Heat milk. Mix in sugar flour and salt. Cook over low heat for 10 min, stirring constantly. Pull out small amount of mixture to add to beaten eggs. Add egg mixture and cook for 1 min longer. Chill in refrigerator overnight. When put in ice cream freezer add the cream and vanilla.