In court mix the sifted flour, sugar, baking soda and salt. In a small saucepan put the butter, cocoa and cola, put on the stove enough to melt the butter and oil mixture is poured into flour. Stir until a homogeneous mass. Separately, mix the egg with the milk and vanilla, add to the other mixture and stir. The mixture is poured into the greased form and bake in preheated oven at 170 C. The glaze is prepared as the cream is placed in a container on the stove, add the chocolate (broken) and keep the fire until almost boiling. Remove and then leave for 4-5 minutes, then pour dessert.