Chocolate Marble Cake Lowfat Recipe

• 2 c. Cake flour
• 1 tsp Baking pwdr
• 1/2 tsp Baking soda
• 1/2 tsp Salt
• 1 1/3 c. Sugar -- divided
• 1/3 c. Unsweetened cocoa pwdr
• 1 tsp Instant coffee pwdr -- or possibly Espresso
• 1/4 c. Water
• 1 lrg Egg
• 1 lrg Egg white
• 6 Tbsp. Unsalted butter -- softened, Cut up
• 1 c. Plain nonfat yogurt
• 2 tsp Vanilla extract

Directions