A chocolate marble cake is a cake with swirls of chocolate throughout the batter. The cake is made by adding melted chocolate to part of the batter and then swirling the two batters together.
Cream the 1/3 cup butter and sugar together, add the well beaten eggs andmix well.
Sift flour and baking powder and add alternately with the milk tothe first mixture.
Put 1/3 of mixture into a bowl and add the 1 Tbsp ofbutter and chocolate which have been melted together.
To the white batter,add the vanilla.
Drop white batter, then chocolate, by spoonfuls into awell-greased, deep cake pan and bake at 350-F about 40 minutes.