Preheat your oven to 375 degrees and grease your muffin tin (or line each well with muffin papers).
In a large bowl, combine the pancake mix and sugar.
In a separate bowl, whisk together the eggs, milk, and oil.
Create a well in the center of the dry ingredients and pour the wet ingredients into it along with blueberries. Then mix with a spatula until just combined, being careful not to over-mix.
Pour the muffin batter into a muffin tin, filling each well ⅔ of the way up.
Place the muffin pan in the oven for 15-18 minutes, or until cooked through. The muffins are done when a toothpick can be inserted into the center and come out cleanly.
Notes
Baking time will vary depending on the size of your muffin pan. You can expect a mini muffin tin to bake considerably faster.