A daring title, but I have cracked it. I can also make them keto friendly. Oh, and by the way? It’s gluten free, too!
Blend the ground flax with the water and vanilla and set to one side.
Cream the sugars with the cocoa butter. Add the flax and vanilla mix.
Sift the remaining dry ingredients together. Slowly add the dry ingredients into the creamed ingredients until fully incorporated.
Pour your batter into a well greased square baking pan, and only then start preheating your oven to 350F / 180C. By waiting till now to heat the oven you give the binder time to activate, which will contribute to the lift.
Bake for 35 to 40 minutes, remove from oven, allow to cool for 10 minutes before turning out. Cut a slice and enjoy.