Into bowl sift:
2 cups sifted flour
¾ cups sugar
½ tea, soda
½ tea. baking powder
¼ tea salt

In separate bowl (blender) combine:
1 egg
½ cup mashed avocado
½ cup buttermilk
1/3 stick butter (optional)

Add liquid ingredients all at once to dry ingredients.  Stir in 1 cup walnuts.  Bake in loaf pan 1 hour at 350 degrees (Makes excellent little sandwiches with cream cheese and orange marmalade)