Don't overmix: Stir the batter just until the dry ingredients are incorporated. Overmixing can make the muffins dense instead of light and tender.
Grate the carrots finely: I like using the small holes of a box grater so the carrots almost disappear into the batter, adding moisture without noticeable chunks.
Save a few blueberries: Press a handful of blueberries onto the tops of the muffins before baking for a bakery-style look.
Measure the flour carefully: Spoon the flour into the measuring cup and level it off rather than scooping directly from the bag. It helps keep the muffins soft instead of heavy.
Cool before storing: Let the muffins cool completely before transferring them to an airtight container so condensation doesn't make them soggy.
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