Cream butter, sugar and salt until light and creamy. Beat the 3 eggs until fluffy and add. Sift the flour, baking powder, cinnamon and soda together and add alternately with the plum juice to the butter mixture. Beat. If the batter seemsa little thin, add a little more flour. Fold in the saisins and almonds.
Pour into a 10"-square pan greased and floured lightly. Bake 1 hour in a preheated 350° oven. After the cake has cooled cut it into squares. Serve with the sauce made of the second set of ingredients:
Mix sugar, cornstarch and salt in a saucepan. Gradually add plums and juice and blend well. Add syrup and cook over low heat, stirring continuously until it thickens, about 3 minutes. Remove from stove and beat in butter. Add the almond extract.