Break eggs into a bowl, add sugar and beat everything together with a mixer or whisk until fluffy.
Add margarine and milk to the eggs one by one, constantly whisking the mixture with a mixer.
Add flour, cocoa and baking powder to the dough, carefully, in portions, stirring constantly. Leave some cocoa for decoration.
Grease the baking pan with melted butter or margarine, or vegetable oil. Pour the dough into the pan and bake in the oven for 40 minutes at 180 °C.
Remove the finished cake from the oven and pour the chocolate glaze over it. Then let the glaze soak into the dough a little and sprinkle the dish generously with the remaining cocoa powder.