Molten Chocolate Center Cakes

Ingridients of Molten Chocolate Center Cakes:

• 7 ounces dark semi-sweet chocolate
• 1/2 cup butter
• 1 teaspoon vanilla extract
• 3 eggs , Separated, Room Temperature
• 1/3 cup cake flour
• 1/8 teaspoon salt
• 1/8 teaspoon cream of tartar
• 1/3 cup sugar
• 2 ounces dark semi-sweet chocolate
• 1 1/2 ounces heavy cream
• 1 teaspoon butter