Put the flakes and germ in a blender, and blend until it becomes flour. Then mix all the other ingredients in a deep bowl and stir the mixture well. Cocoa butter must be liquid, so melt it at a low temperature. If you do not have cocoa butter, use melted coconut oil.
When the mixture is well combined (you need to make a big ball), put it on baking paper and put another layer of paper on top. Try to pull out a thin crust with a rolling pin. Then remove the layer of paper from the top and cut rectangular bars with a knife.
Store them in the refrigerator, but at first do not stack them on top of each other, first let them tighten and then you can put them in a smaller container on top of each other. If you are not waiting for them to tighten, put a small piece of baking paper between each bar.