You will need to use the middle position oven rack; adjust if necessary. Preheat oven to 400 degrees F (204 C).
In a bowl, mix the first five ingredients: flour, sugar, baking soda/powder, and salt.
In a separate bowl mix 4 oz of sour cream and 1 egg. Pour sour cream mixture into your large bowl containing the flour mixture. Use your hands to blend and lightly fold in the blueberries.
Create 6 balls and then lightly flatten into the desired shape. Place on a cookie sheet and sprinkle with 2 tsps of sugar. The dough should be about 3/4 of an inch thick.
Bake for about 15 to 16 minutes or until lightly golden on top. Be careful not to burn the bottoms.