Martha Washington's Colonial Chocolate

This was George Washington's favorite hot chocolate.

4 tablespoons cocoa
Small amount of cold water
2 cups water
1/3 cup granulated sugar
2 cups milk
2 tablespoons cornstarch
Small amount of cold milk
1 egg
1/2 cup hot water
1/2 teaspoon vanilla extract

Mix cocoa and cold water to a smooth paste in a saucepan. Stir in the 2 cups water, sugar and milk. Bring to a boil and blend in cornstarch which has been dissolved in the cold milk. Boil 3 minutes longer.

Remove from heat and set in a warm place. Beat egg and hot water until light and foamy. Pour half of egg mixture into a pitcher. Blend in vanilla extract. Add to chocolate slowly. Pour remaining egg mixture over top. Serve.