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 1/2 cup milk and 1/2 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: 1/2 c white sugar 1 1/2 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.