No Fat Mocha Cake

Ingredients

• 1 c. all-purpose flour
• 1/3 c. plus 2 Tbsp. instant cocoa powder
• 1 tsp. instant Espresso powder or instant coffee powder
• 1 tsp. baking powder
• 1 tsp. baking soda
• 6 large egg whites (room temperature)
• 1 1/3 c. firmly packed golden brown sugar
• 1 c. coffee flavored nonfat yogurt
• 1 tsp. vanilla extract
• 1 tsp. powdered sugar
• 1/2 tsp. ground cinnamon