This coffee cake symbolizes the warmth and comfort Cora tries to provide for Leni against the backdrop of their tumultuous family life.
Preheat oven to 350°F.
Cream butter and sugar until light and fluffy.
Beat in eggs, one at a time, then stir in sour cream and vanilla.
Combine flour, baking powder, baking soda, and salt.
Gradually add to creamed mixture.
Pour half the batter into a greased pan.
Mix nuts, brown sugar, and cinnamon; sprinkle over batter.
Cover with remaining batter.
Bake for 25 minutes or until a toothpick comes out clean.