1 c. brown sugar
2 tbsp. butter
1 tbsp. flour
1 egg yolk
1 c. milk
1 tsp. vanilla
1/4 tsp. salt
(Best done in a cast iron
skillet.) Boil sugar and butter together until soft. Beat
the egg yolk well and add it to the flour, milk, vanilla,
and salt. Carefully stir a little at a time into the sugar
mixture. Cook, stirring constantly, until thick and bubbly