First up, gather all of your ingredients. If you don't have buttermilk, you can substitute, but it's not the same, I'd use buttermilk if I were you. Or, make your own with milk and vinegar.
Sift out the pancake mix. In a separate bowl mix the buttermilk and the egg together. Then combine. Mix well.
In a non-stick pan, pour a bit of oil and heat. Then, spoon in 1 large helping of the pancake batter. Top with a few washed blueberries. After about 2-3 minutes, flip. Cook again for 2-3 minutes. Don't burn them - you might have to flip back and forth to ensure the centre is cooked but that the pancake doesn't burn.
That's it. Make the whole batch and then top with peanut butter and eat up. Just a tip - these pancakes are awesome as leftovers, they toast up in the toaster and are almost just as good as freshly made. Enjoy.