I used chickpea flour instead of coconut flour because I was out of coconut flour. Usually it's hard to do a 1-to-1 replacement of coconut flour in baking because coconut flour is a dense, moisture sucker (as I learned when I tried to use it in my sweet potato pancake turned sweet potato cake recipe). HOWEVER, chickpea flour is also dense and the recipe calls for such a small amount that it worked out fine.