This is an easy brownie recipe made with cocoa powder. First beat the eggs with sugar than add cocoa powder, milk and oil. Mix well with a blender and finally add the flour as well. Grease with oil a 25x30 cm pan, and strew with roughly squieezed walnut the bottom of the pan. Than mould the brownie into the pan and bake it for 10-20 minutes on 180 C degree. Let it cool and slice it. Serve with jam, or grease the top with melted chocolate or bestrew with icing sugar, the variation unlimited.