Cream butte, gradually beating in brown sugar, working mixture until light and fluffy.
Add eggs, one at a time, beating well after each is added.
Stir in apples and sour cream.
Sift together flour, baking powder, baking soda, salt and spices.
Toss flour mixture with nuts, add it to batter and mix well.
Spread batter evenly in buttered loaf pan and let stand for 20 minutes.
Bake bread in moderate oven (350°) for about 1 hour, until it tests done.
Let bread cool on rack for 5 minutes before removing from pan.