Crumb Cake

2 cups flour
3/4 cup butter
Rub the two ingredients above to crumb
Take out 1 cup of the crumbs and add 1 cup of sugar to it...set this aside

Next
4 tbsp of cocoa and 1/2 tbsp of fat (lard or shortening) OR 1 square of baking chocolate
1 cup of sour milk
1 egg
1 tsp baking soda
1 tsp cloves
1 tsp cinnamon
1 cup raisins and 1 cup of currants OR 1 lb. of dates
Mix all ingredients together with the all of the flour mixture except the reserved 1 cup of crumbs.
sprinkle crumbs on top and bake

Again, Grandma's recipe book doesn't really give temperature for the oven as it was likely a wood burning stove, and so heating to 350 F or 375 F will probably do.  There are also never any times on the recipes...so good luck.