Soak the flax (this is a substitute for an egg), pour in the vegetable oil and sugar. Whip.
Finely chop the chocolate and mix it with the cocoa.
Sift the flour with baking powder.
Cocoa with chocolate pour hot coffee ( I have custard, strained through a sieve). Add the resulting mixture to the mass with flax. Stir.
Add the flour and stir. To distribute the forms. Bake in a preheated 180-200 °C oven for 12 -15 minutes . Brownies should be very moist inside. The main thing is not to over-bake them , or the structure and taste will not be the same.