This recipe is so similar to TS's recipe, I wouldn't doubt if this is the one they used. I cook for a crowd, so I doubled the recipe and submitted it below. If you're serving a smaller group, cut the recipe in half and bake it in an 8x8.

1/2 cup shortening
2 cups sugar
2 eggs
2 tsp vanilla
2 cups flour
1 tsp. baking soda
1 tsp. baking powder
1 tsp. salt
1 tsp. cinnamon
1 tsp. nutmeg or mace
1 tsp. ginger
6 cups peeled, diced tart apples

Cream shortening and sugar. Add eggs and vanilla. Combine dry ingredients and add to mixture. Stir in apples. Spoon into greased 11 x 13 pan. Bake at 350 for 45-50 minutes or until the toothpick comes out clean.

Optional: Add 1/2 cup chopped nuts to recipe at same time as apples.

Optional: Serve with warm caramel sauce and icecream/whipped cream.