Combine remaining evaporated milk, flour, salt and egg yolks in a medium bowl.
Heat milk (non evaporated) in a small sauce pan over medium head until tiny bubbles form around the edges.
Watch the temperature, milk burns easily.
Combine the flour mixture into the brown sugar mixture and stir.
Slowly, add the hot milk to the brown sugar and flour mixture, whisk.
Return to medium heat for 12 minutes – until it thickens to pudding consistency.
Tip: Keep the heat steady, it will be liquid until minute 10 that BAM! thick.
Remove from heat, add vanilla.
You will need:
Remove from heat, and add butter or margarine and vanilla.
Pour into cooked pie crust.