I recently read a list of tips for heart health and one of the tips was to avoid powdered milk, including whey protein powder.

I decided to substitute 1 T of soy flour for 1 T of the whey protein powder in this recipe. I discovered that the cake is lighter, fluffier, and bakes up taller. Many stores now sell soy flour in a relatively large box for around $1.50. I am adding soy flour to my list of low-cost, low-carb kitchen supplies.