Recipe By: Entertaining! Fast and Fancy Cookbook by Renny Darling.
Beat together first 4 ingredients until mixture resembles coarse meal. Beat in raisins and walnuts. Beat together eggs, sour cream and vanilla until blended and add, all at once, to flour mixture. Beat until blended. Do not over beat. Spread batter (it will be very thick) into a greased 10-inch pan and sprinkle top with 1 teaspoon sugar (optional, but nice). Bake in a 350 degree oven for 25 to 30 minutes, or until top is browned and a cake tester, inserted in center, comes out clean. When cool, remove from pan and cut into wedges to serve. Note: Dried currants can be substituted for the raisins. Walnuts can be omitted, but are a nice addition.