Heat in top of double boiler 1 qt. sweet milk. Slightly beat 4 whole eggs. Add to the eggs 1/2 cup sugar, 1/8 tsp. salt. Beat eggs again & spoon a little hot milk into the eggs and stir well then add the eggs to hot milk stirring constantly until mixture thickens enough to coat a spoon. Remove from heat and place in a pan of cold water stirring constantly for a minute or two. Add 1 teaspoon vanilla & continue to cool. If custard has a tendancy to curdle, beat with egg beater until smooth again. NOTE: She only used whole milk, not 2%, etc. Also, place the pan you cooked it in in the cold water, don't pour mixture into cold water.