In a large bowl sift together:

2 1/2 cups flour

1 1/2 tsp. baking soda

1/2 cup cocoa

1 cup sugar

1/2 tsp. salt

In a smaller bowl combine:
1 egg, beaten

1/3 cup butter, melted

1 1/4 cups sour milk*

*Sour milk: add 1 tbsp. vinegar to 1 cup milk at room temp. Allow to sit 5 minutes.

Combine mixtures until just blended.

Fold in:
3/4 cup chopped walnuts

Pour into sprayed 9 x 5 loaf pan. Bake at 350° F for one hour.