Famous Department Store Blueberry Muffins Recipe. Excellent. We used 2.5 cups wild blueberries, tossed in some of the flour within the 2 cup measure. Also it needed more salt than the 1/2 tsp. I'd try 3/4 tsp next time, and maybe 1 1/8 cup sugar instead of just the 1 cup. Also used 3/8 cup buttermilk and topped up with milk to thin it, totalling a little over 1/2 cup). No other changes. It was excellent.