In a bowl add the egg, milk, butter, sugar and baking powder.
Completely mix these ingredients.
Begin adding flour to the mix and work well.
When all the ingredients are well amalgamated, move it to a flat surface and continue to work it with your hands until it reaches a firm consistency. Continue to add flower as needed.
Flatten the dough by hand and then continue to flatten it into a round shape with a rolling pin.
Continue flattening the dough until you have a sheet of dough about 1/4 inch tick and about 15" in diameter.
Take a 9" springform pan, coat it with butter and then sprinkle some flour over the butter.
Lay the dough over the springform pan. Let any excess dough hang over the sides of the pan. Do not cut the excess yet.
Filling Preparation:
In a large mixing bowl add all the ingredients for the filling.
With an electric mixer, mix all ingredients.
Cake Preparation:
Pour the mixed filling into the baking pan.
With a sharp knife cut any excess crust dough. Leave 1/2" of dough above surface of the filling.
Bake for 1 1/2 hours at 350F.
Garnish with confectioner sugar or any other topping you desire.