Stone the prunes if they still have their stones. Boil them and put them through a food chopper. Mix with the sugar, cinnamon and water. Bring the prune mixture to a boil and add 1 teaspoon of vanilla. Boil for about 15 minutes. Keep warm for spreading on the cakes.
Preheat the oven to 375ºF.
Cream the butter. Add the sugar gradually then add eggs one at a time. Add dry ingredients, flavoring and cream. Add all the flour and knead (don't knead too much).
Divide the dough into 6 equal parts. Place each part on the bottom of a round tin. First you flatten the dough with your hands, to fit the tin. To get it nice and even put a wax paper over the layers and with a glass or rolling pin, lightly roll over it.
Remove the wax paper and with a fork, make small holes in the layers. Bake them to a golden brown color at 375ºF degrees for about 10 minutes.
Remove each layer from its tin and cool before putting together with the prune filling. When cooled place one cake layer on a flat plate, add a layer of prune filling and continue adding cake and filling layers, with the cake layer being the top.