Preheat the oven to 350F. Line a 12-count muffin pan with muffin liners and spray with cooking spray. Set aside.
To a bowl, add your dry ingredients and mix well. Next, add the wet ingredients and mix until just combined. Fold in your blueberries using a rubber spatula. Careful not to break them!
Distribute the batter evenly amongst the 12 muffin liners. Bake for 20-23 minutes, or until a toothpick comes out mostly clean.
Remove the muffins from the oven and let them cool in the pan for 10 minutes. Transfer them to a wire rack to cool completely.