Pour the egg into a bowl. Add the brown sugar to it, and using a mixer, beat these ingredients thoroughly until the initial volume has approximately tripled.
Then mix the grated coconut and vanilla sugar into the fluffy egg mixture.
Next, add the amaranth flour. Stir everything well.
We have a very sticky and soft dough. Divide it into 7 pieces and roll each piece into a ball. Place the pieces on a Teflon mat (parchment paper) and press lightly. We decided to make small cookies (about the size of a walnut). Carefully move the mat with the cookies to a baking sheet and place them in a preheated oven (180 °C) for about 25-27 minutes.