I had to buy a container of sour cream for a dinner we had last week. I had leftover sour cream and some walnuts in the pantry. Sounds like a Walnut Sour Cream Coffee Cake to me. I found a super-easy recipe on Allrecipes . This could not be easier. The hardest part was deciding on what baking pan to use. I made 1/2 the original recipe. This is the recipe cut in half- Ingredients- 1/2 cup white sugar 1/4 cup butter 1 cup all-purpose flour 1/2 (8-ounce) container reduced-fat so