Mary's Nut Cake

This is a recipe that was given to my Grandmother by a neighbor. It is a VERY difficult recipe to make. It has been known to fall if taken out of the oven too soon, or if a draft hits it while cooling,but even with it’s difficulties, it is worth the effort it takes to build.
8 eggs
8 Tbl sugar
4 Tbl flour
4 Tbl finely chopped walnuts or pecans
1 tsp baking powder
1/2 tsp vanilla
Preheat oven to 350. Separate egg and beat whites until stiff. Mix and beat all remaining ingredients
until foamy; then GENTLY fold in egg whites. Pour into two lightly greased and floured cake pans and cook 30 to 35 minutes.
COOL UPSIDE DOWN, COMPLETELY, IN TINS.

Filling & Frosting For Mary’s Nut Cake

1/2 lb unsalted butter
1/2 c cold coffee
4 beaten eggs
6 Tbl sugar
1/2 c finely ground walnuts or pecans
Mix all ingredients EXCEPT butter and walnuts. Cook over low heat until it is the consistency of custard. COOL COMPLETELY!!!
When mixture is completely cool, add butter, mixing until mixture is smooth. Fill and cover cake, sprinkling ground walnuts on both layers and pressing them into the sides.