Sift together first 6 ingredients.
Stir in whole-wheat flour.
Cream together butter and sugar.
Add eggs one at a time, beating well after each addition.
Add dry ingredients alternately with milk and vanilla to creamed mixture; beat smooth after each addition.
Stir in nuts.
Turn into greased 8 1/2 x 4 1/2 x 2 1/2-inch loaf dish.
Bake at 350° for 55 minutes or till done.
Cool 10 minutes.
Remove from pan.