1 ¼cups(250g)fresh or frozen blueberries(See Recipe Notes)
For topping
1tablespoon(14g)unsalted buttermelted, optional
Coarse sugarfor sprinkling, optional
2tablespoonspacked light brown sugaroptional, for sprinkling
Instructions
Make the muffin batter
Preheat your oven to 400°F. Grease and/or line a 12-cup muffin tin with muffins liners. Set it aside.
In a medium bowl, whisk together the buttermilk, melted butter, lemon juice, and eggs until well combined.
In a large mixing bowl, whisk together the flour, xanthan gum, cornstarch, baking powder, baking soda, salt, and sugar.
Toss the blueberries in about 1 tablespoon of the dry mixture to coat. Set them aside.
Create a well in the center of the dry ingredients. Add the wet mixture and mix until just combined. The batter will be thick.
Use a silicone spatula to gently fold in the floured blueberries until evenly distributed, taking care not to burst the berries.
Divide the batter evenly among the muffin cups, piling it a bit more toward the center of each well, if possible. The cups should be completely full.
Brush the tops with melted butter and sprinkle with coarse sugar, if using. And/or sprinkling the brown sugar evenly on top.
Bake the muffins
Bake at 400°F for 10 minutes. Then reduce the heat to 350°F.
Finish baking the muffins at 350°F until a toothpick inserted in the center (and not in a blueberry) comes out with no more than a few moist crumbs attached (10 to 12 minutes more). When the muffins are done baking, the tops will also spring back when pressed gently in the center.
Let muffins cool in the tin for 10 minutes before transferring to a wire rack to cool completely.
Video
Notes
Flour blend/xanthan gum tips These muffins work best with a well-balanced gluten free flour blend like Better Batter, with an extra 1/4 teaspoon xanthan gum for taller muffins, or Nicole’s Best with 1 1/2 teaspoons xanthan gum (a bit more than usual per cup for muffins, so they rise tall). If using Bob’s Red Mill 1-to-1, add 3/4 teaspoon extra xanthan gum to avoid a crumbly texture since the blend has some, but not enough, binder. For DIY blend instructions, visit my all purpose GF flour blends guide. Using frozen blueberries Don’t thaw them! Use straight from the freezer and toss in dry ingredients before folding into the batter.Dairy free version Use half plain dairy-free yogurt and half unsweetened non-dairy milk, by volume, instead of buttermilk. Swap butter for block-style vegan butter (like Miyoko’s or Melt brand). And be sure to choose a dairy free flour blend.