INGREDIENTS
!2 tablespoons unsalted butter
!Cake
1 1/3 cups
all-purpose flour
1 tsp
baking powder
1/4 tsp
baking soda
1/4 tsp
salt
1/4 tsp
cinnamon
1/4 tsp
clove
1/2 cup
unsalted butter, softened
2/3 cup
brown sugar
1
egg
1 tsp
vanilla
2/3 cup
sour cream
!Topping
1/4 cup
brown sugar
1/4 tsp
cinnamon
1/4 tsp
clove
1/2 cup
walnuts, chopped
1 cup
apple slices (peeling optional)