My blueberry muffins recipe doesn't need any secret ingredients or special tricks to be the best! I just use tangy buttermilk, sweet berries (fresh or frozen!) and a 'lil lemon zest to give them a bright flavor, plus lots of love by gently folding in the blueberries and sprinkling with a bit of sugar. These classic one bowl lemon blueberry muffins bake up fluffy and moist inside, with golden brown and lightly crisp muffins tops in only 20 minutes.
Preheat the oven to 375 degrees F. Line standard muffin pans with 18 paper muffin liners. Spray the exposed edges of the pans with nonstick cooking spray. Set aside.
In the bowl of an electric mixer, cream the softened butter and granulated sugar on high speed until light and fluffy, about 3-5 minutes. (Don't skimp on the time; this make the batter texture light and fluffy.)
Scrape the bowl with a rubber spatula. Then turn the mixer on low and beat in the buttermilk, eggs, 2 cups flour, cornstarch, baking powder, salt, vanilla, and lemon zest.
Once the mixture looks smooth, turn off the mixer as to not over-beat the batter.
Scrape the bowl again. Then toss the blueberries with the remaining 1 tablespoon flour. Use the spatula to gently mix the blueberries into the batter. Try not to squash the berries.
Use a cookie or ice cream scoop to portion the batter evenly into the paper liners. (They will be pretty full.) Then sprinkle the turbinado sugar over the tops of the batter. *You can add a few extra berries to the top of each muffin if you like.
Bake for 20-24 minutes, until a toothpick inserted into the center comes out clean. Allow the muffins to cool for 5 minutes before flipping out of the pan.
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Notes
This recipe makes 18 regular size muffins, or 12 extra large muffins.Gluten Free? Swap the flour with your favorite GF 1-to-1 Baking Mix.Vegan? Swap the butter and buttermilk with plant-based alternatives. You can make vegan buttermilk by combining 1/2 cup nut milk with 1 1/2 teaspoons vinegar. Use flax eggs or store-bought "vegan eggs" in place of the chicken eggs.Storage: I suggest keeping the muffins in an airtight container on the counter for up to 3 days. This keeps them soft but not too soft, moist and fluffy. If you have to store them for longer, seal them in an airtight container and keep in the fridge for up to a week. They will be a bit more dense and not as fluffy. But the delicious lemon and blueberry flavors will still be bright!To Freeze: I recommend freezing the muffins for longer longer storage. Wrap each muffin individually and place together in a ziploc freezer bag. Freeze for no more than 2-3 months for the best taste. I pop them out of the bag one at a time as needed and let them come to room temperature on the counter for 30 minutes or so. The muffins are good to eat right after thawing, but I usually prefer to warm them up slightly to get mine super soft again. Loosely wrapping it in a paper towel and microwaving for 10 seconds at 50% power does the trick!