In saucepan put the 5 tbs. cocoa and 5 tbs milk and bring to a boil stirring constantly, remove from heat and cool. Cream butter and sugar, add beaten eggs. Add the half cup milk and half cup flour. Add the cocoa mixture then the flour, baking powder and salt. Add vanilla. Pour into greased and floured 9 in. layer cake pans. Bake in 350 oven 30 35 min. FILLING: half c white sugar 1.5 tbs. cocoa 1 heaping tbs. flour 1 c hot water 1 tbs. butter Cook until thick and cool. Cut each cake layer in two and put some filling between each. On top sprinkle some icing sugar.