Margaret's mother called this the Thousand Mile Shortcake, because she sent so far for the recipe to the place where she had once eaten it, when she thought it the best she had ever tasted.
Mix the baking-powder and salt with the flour and sift all together. The butter should stand on the kitchen table till it is warm and ready to melt, when it may be mixed in with a spoon, and then the egg, well beaten, and the milk.
Divide the dough into halves; put one in a round biscuit-tin, butter it, and lay the other half on top, evenly. Bake a light brown; when you take it out of the oven, let it cool, and then lift the layer apart. Mash the berries, keeping out some of the biggest ones for the top of the cake, and put on the bottom layer; put a small half-cup of powdered sugar on them, and put the top layer on. Dust this over with sugar till it is white, and set the large berries about on it, or cover the top with whipped cream and put the berries on this.