1Preheat oven to 400^ Bake pie 10 minutes then turn down to 350^, and finish baking.
Grease a 9-inch pie plate with butter. Combine cranberries,walnuts and 2 Tablespoons Bisquick,toss to coat. Pour evenly over the buttered pie dish.
Beat remaining ingredients until smooth, 15 seconds in blender on high or 1 minute with hand beater. Pour into plate over berries and nuts.
Bake until knife inserted in center comes out clean, 50 to 55 minutes; cool.