Breads: Overnight Coffee Cake

2 cups sifted flour
1 t baking soda
1/2 t salt
2/3 cup butter
1/2 cup brown sugar
1 cup buttermilk
1 t baking powder
1 t cinnamon
1 cup sugar
2 eggs
Cream butter and sugars.  Add eggs, 1 at a time and beat well.  Sift dry ingredients and add to better alternately with buttermilk.  Pour into greased and floured 9 x 13" pan.  Mix together:
1/2 cup brown sugar
1/2 cup nuts, chopped
1/2 t cinnamon
1/4 t nutmeg
Sprinkle over cake.  Place in refrigerator overnight or for 8 hours.  Bake at 350 F 45 minutes.