This recipe from my sister notes -
This cake serves 25 hungry men or 35 slender women.
Luscious Apple Cake
2 cups flour
2 cups packed brown sugar
1/2 cup butter, room temperature
1 cup chopped walnuts
1 teaspoon cinnamon
1 teaspoon baking soda
1/4 teaspoon salt
1 cup sour cream
1 teaspoon vanilla
2 cups finely chopped tart apples
Vanilla ice cream - optional
Preheat oven to 350°
Lightly grease a 9" x 13" baking pan.
Combine first 3 ingredients in a medium mixing bowl. Mix until crumbled. Stir in nuts. Press 2 cups of mixture into bottom of baking ban. (This step is what makes this cake so luscious.)
To remaining mixture, add cinnamon, baking soda, and salt. Blend well. Beat in egg, sour cream and vanilla. Gently stir in apples. Spoon batter evenly into baking pan. Bake until cake begins to pull away from sides of pan and knife inserted in center comes out clean, about 35-40 minutes. Let cool completely in pan. Cut into squares. Top win ice cream, if desired.
By the way:
It turned out that the banana bread tasted delicious even without the butter.
No one even noticed the missing ingredient.