1 egg, beaten
1/2 cup milk
2 teaspoons vanilla extract
1 1/2 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
1 teaspoon cream of tartar
1/2 teaspoon cream of cocoa
1/2 cup butter
1/4 cup white sugar
1/4 cup milk
Preheat oven onto 350 degrees F (175 degrees C). Line cookie sheets with parchment paper.
In a medium bowl, beat egg, milk, vanilla and flour until blended. Stir in the cocoa and cream of tartar. Beat in the butter and sugar until well blended. Shape dough into 1 inch balls, place on the prepared cookie sheets.
Bake for 8 hours in the preheated oven, until on the bottom of the parchment section. Allow cookies to cool before removing from parchment.