Brown Sugar Toffee Cake - Chef In You

Ingredients

• 1-1/2 cups all-purpose flour
• 1/4 tsp. baking soda
• 1/8 tsp. baking powder
• 1/8 tsp. salt
• 3 tbsp. butter, softened
• 2-1/4 tbsp. vegetable oil
• 1 cup brown sugar
• 1/2 cup sugar
• 4 egg whites, at room temperature
• 1/4 cup cold strong coffee
• 1 tsp. vanilla extract
• 1/2 cup fat free plain Greek yogurt, at room temperature (or plain yogurt)
• 3 milk chocolate-toffee bars, such as Heath