Take as much of the coffee cake dough as you desire, lay it on a well-floured biscuit board and mix just enough more flour with it to enable you to roll it out without sticking to the board. Roll out about one-fourth inch thick and cut the dough in squares about as long as your finger.
Beat the yolk of one egg and two tablespoons of milk together; wet each square well with the mixture, lay one raisin in the centre (after the seed has been removed from it), sprinkle thickly with sugar and cinnamon mixed together, then put a small dab of butter on top. Catch the four corners of each square together, so that the inside is protected. Lay the pocket books, not too closely together, in a greased pan and set aside to rise. When well risen bake in a moderately hot oven until well baked and browned nicely.