Preheat the oven to 425°F, and lightly grease a muffin pan or line with paper liners. Set aside.
Whisk together the flour, sugar, baking powder, and salt in a large bowl.
2 ¼ cups all-purpose flour, ⅔ cup granulated sugar, ½ cup light brown sugar, ½ teaspoon salt, 1 tablespoon baking powder
In a separate small bowl, combine the milk, butter, oil, eggs, and vanilla. Pour the wet ingredients into the dry ingredients, and stir until a few dry streaks remain.
1 cup whole milk, ¼ cup unsalted butter, ¼ cup neutral tasting oil, 2 large eggs, 1 teaspoon vanilla extract
Fold in the blueberries, and divide the batter evenly between the muffin cups (about ⅔ to ¾ full).
1 ½ cups blueberries