Blend the flaxseeds and soak with water for about 5 min
Whisk together flaxseeds, sugar, brown sugar, and vanilla in a bowl
Chop the butter and whisk it with the rest of the dough
Stir the dry ingredients in the dough: Baking powder, flour, oat, and coconut
Chop the hazelnuts (into fine pieces) and chocolate (into medium pieces) and add it to the dough
Form balls at the size of tennis balls and put them on a sheet of baking paper on a baking pan. Sqezze the balls flat either with your hand or a table spoon with some flour on the back of it (so that it doesn't stick to the cookies)
Bake the cookies in the middle of the oven at 180° C in 10-12 min