When in season, fresh is always best. But you can use frozen. Just keep them frozen and toss them in a bit of flour before adding them to the batter.
Whisk sugar, eggs, oil, milk and vanilla extract together in a bowl.
Add the flour, baking powder and yogurt and whisk until just combined.
Gently fold in blueberries, and do not overmix.
Fill a 12-cup muffin with papaer liners that have been coated with cooking spray. Sprinkle with brown sugar.
Bake at 375°F for 20-25 minutes. Enjoy!
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