One chaffle I love is just combining an egg, almond flour, greek yogurt, xantham gum and quite a lot of tikka masala powder (the red one), and a bit of water.
Another one, which I discovered yesterday by experimentation, consists of an egg, almond flour, xantham gum, lots of powder cinnamon, and 100% pure chocolate powder (not alcalinized), plus some olive oil and a bit of water. Please note there is no dairy! Also, there is no sweetener. In the past, I had added stevia, but it was not working well. Today, I have just taken a teaspoon, and I was eating stevia (powder) every time I was taking a mouthful of the chaffle-not-chaffle. Much better!
The consistency is really good (I believe it is the xantham gum), and cinnamon (lots of it) gives a real flavour to the chocolate. This recipe has little saturated fat, which is good (or neutral), since it has no dairy.