GERMAN BLUE PLUM CAKE

Ingredients
¼ lb butter
2 eggs
½ teaspoon salt
1 teaspoon vanilla
¾ cup sugar
1 ½ cup flour
1 teaspoon baking powder
¼ cup milk (or more)
2 ½ to 3 lb purple plums
1 cup chopped nuts

Directions
Cream together butter and sugar.  Mix well together the eggs, flour, salt, baking powder, vanilla, and milk.  Grease a jelly roll pan and preheat oven to 375 F.  Spread dough on pan.  Halve, pit, and rinse plums.  Put plum halves on dough with cut side up and touching each other.  Sprinkle plums with sugar and cinnamon.  Dot each plum with a tiny piece of butter.  Sprinkle nuts over plums.  Bake at 375 F for 30 minutes.