Boiled Custard - cooking recipe

Ingredients

1/2 gal. sweet milk
6 egg yolks
1 c. sugar (full measure)
2 Tbsp. flour
1 Tbsp. vanilla

Preparation

Heat the milk in
a
double
boiler
until forms a skim (light).
While the milk
is heating, beat the egg yolks well, then add the sugar\tand
flour,
which
have
been mixed well. When the milk is hot,
remove the skim.
Add the egg and sugar mixture slowly,
stirring
constantly.
When
this\thas cooked long
enough to lightly
coat
the\tspoon,\tit
is\tdone.
Add vanilla.
(Optional, you can add beaten egg whites into this.)