1 1/3 c. oatmeal
1 c. brown sugar
1 tsp. baking soda
1 1/3 c. flour
1 c. melted butter
4 egg yolks
1 1/2 c. white sugar
3 tbsp. cornstarch
2 c. sour cream
2 c. raisins

Mix first 5 ingredients. Put all but 1/3 of this in a 9"x13" pan. Bake for 15 minutes at 350 degrees. Mix and boil on low heat for 5 to 10 minutes other ingredients listed. Pour over baked mixture; top with remaining crumb mixture. Bake 20 minutes at 350 degrees.