Drop Cookies with Sour Cream

Ingredients

 * ½ cup of butter
 * ¼ teaspoonful of sifted soda
 * 1 cup of sugar
 * 2½ cups of sifted flour
 * 1 egg, beaten light
 * 3½ level teaspoonfuls of baking powder
 * ½ cup of sour cream

Directions

 * 1) First mix in the usual manner, stirring the soda into the cream.
 * 2) Mix the whole together very thoroughly; the mixture will be quite stiff.
 * 3) Drop from a spoon onto buttered tins, shaping each portion into a smooth round.
 * 4) Dredge with granulated sugar.
 * 5) Bake in a moderate oven.