In blender or food processor, chop:

1 whole orange, including peel
1 c. raisins with 1 c. buttermilk

Cream:

1/2 c. butter
1 c. white sugar
2 eggs

Add:

2 c. flour
1 tsp. baking soda
1 tsp. salt

Add alternately with buttermilk mixture. Bake in greased 9x13 pan 45 minutes in a 350 degree oven.

While cake is warm, poke full of holes and drizzle 1/2 of 6 ounce can orange juice concentrate over. Sprinkle with 1/3 cup white sugar and 1/4 cup chopped nuts, if desired.