Blackberry Jam Cake-Libby Lightner

Mix in mixer:

1 c butter                    2 c sugar

3 egg yolks                 1 c blackberry jam

1 t soda                       1 c buttermilk

3 c flour                       1 t cinnamon

1 t salt

Fold in 3 stiff egg whites

Bake 30 min at 350^o.