Gran'ma Wood's Cream Puffs

Pastry:

1 cup boiling water

½ cup butter

1 cup flour

4 eggs

Boil water and butter, add flour and stir rapidly;  remove from heat.  Break and stir in each egg separately.  Cool and bake in hot oven.  (Preheat oven to 400°)

Filling:

1 cup milk

½ cup sugar

½ cup flour

1 egg

flavoring

Combine sugar, flour, and salt in large double boiler. Whisk milk and egg and add to sugar mixture.    Bring to simmer, whisking occasionally over medium heat. Reduce heat to medium-low and cook, whisking constantly, until thickened and large bubbles appear at surface, 2 to 3 minutes. Off heat, stir in vanilla.