Soak the flax (this is an egg substitute), pour in vegetable oil and sugar. The whip.
Finely chop the chocolate and mix it with cocoa.
Sift the flour with baking powder.
Pour hot coffee over cocoa and chocolate (I have custard filtered through a sieve). Add the resulting mixture to the mass with flax. Mix it.
Add flour and mix. 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 bake them, otherwise the structure and taste will not be the same.