Heat a griddle or nonstick skillet over high heat.
In a bowl, combine the flour, sugar and baking soda and mix.
Make a well in the center (just indent with the back of your mixing spoon) and crack the egg into the well. Pour the buttermilk on top of the egg, stir from the center to break the egg yolk, and continue to stir until only a few small clumps are left (a few small clumps are okay; don't overmix).
Gently fold in the blueberries and set aside.
Spray the griddle with cookie spray (or use butter like I like to). With a 2 tablespoon cookie scoop or a spoon. Scoop about 2 tablespoons of pancake batter and pour onto the griddle. Cook for about 4 minutes on each side and then flip and cook for another 1 or 2 minutes.
Repeat until all pancakes are made, then serve warm.
Make sure you don't overmix the pancake batter. Lumps are totally fine.