Chocolate Mayonnaise Cake

• 2 1/4 cup flour
• 1 tsp baking soda
• 1/4 tsp baking powder
• 3 eggs
• 1 tsp vanilla
• 1 cup mayonnaise
• 4 oz. unsweetened chocolate
• 1 1/3 cups water
• 1 2/3 cups sugar
• 1/2 tsp salt
• 1/8 tsp cinnamon

Heat oven to 350 degrees F. In double boiler, melt chocolate. Add mayonnaise and water to chocolate over medium heat. When smooth, cut heat. Fluff eggs and add sugar. Add chocolate mixture. Mix in dry ingredients and pour into greased 9 x 13 pan. Bake for 40-45 minutes.