1 c. brown sugar, packed
1/4 c. cornstarch
1/2 tsp. salt
2 2/3 c. milk
1/3 c. butter

Mix brown sugar, cornstarch, and salt in saucepan. Stir milk in gradually. Add butter. Cook over medium heat (or in double boiler), stirring constantly, until mixture thickens and boils. Boil 1 minute. Remove from heat.

Gradually stir at least half of hot mixture into 3 egg yolks, slightly beaten. Then blend into hot mixture in saucepan. Boil 1 minute more, stirring constantly. Remove from heat. Blend in 1 1/2 teaspoon vanilla.

Pour immediately into baked pie shell. Spread meringue lightly on top, sealing to edge of crust to prevent shrinking. Bake until delicately browned. Let cool at room temperature. Bake in 400 degree hot oven for 8-10 minutes for meringue.