This recipe came from the Martha Stewart's web site. It is probably best to use fresh blueberries in this recipe, or if you use frozen make sure they are well thawed out. The sugar topping makes a crunchy topping. I love the addition of lemon zest in the scones, because it brings out the blueberry taste. Instead of zest you can also use lemon oil (1/4 tsp), and you will get a mild background lemony taste. Probably best to make these on the day you will eat them. They are not as good the day after. Right out of the oven with a pipping hot cup of coffee is the way to go!