Preheat oven to 375°F and line 14 muffin cups with cupcake papers, or spray tins with non-stick cooking spray.
In measuring cup, stir together milk and vinegar; set aside (see note).
¾ cup milk, 1 tablespoon white vinegar
Whisk flour, bran, sugar, baking powder, baking soda, cinnamon, and salt in a medium bowl, set aside.
1 ½ cups whole wheat flour, ⅔ cup wheat bran, ½ cup granulated sugar, 2 teaspoons baking powder, ½ teaspoons baking soda, 1 teaspoon ground cinnamon, ¼ teaspoon salt
In large bowl, lightly whisk eggs. Add oil, vanilla, and milk mixture; stir.
2 large eggs, ⅓ cup canola or vegetable oil, 2 teaspoons pure vanilla extract
Add dry ingredients to the egg mixture; combine just until blended. Fold in blueberries.
1 ½ cups blueberries, fresh or frozen
Divide into prepared muffin cups (about ¾ full) and sprinkle tops with turbinado sugar, if desired.
1 tablespoon turbinado sugar, optional
Bake for 18 to 20 minutes, or until firm and lightly browned on top. Toothpick inserted in the center should come out clean or with a few moist crumbs.
Cool in tins for 10 minutes. Remove muffins from tins (if necessary, run a table knife around the edges lightly to loosen muffins) and completely cool on wire rack.
Video
Notes
Milk: If desired, substitute ¾ cup buttermilk for the milk and vinegar combination. Plain regular yogurt (not Greek yogurt) can be substituted as well.
Using frozen blueberries: Frozen blueberries, straight out of the freezer, work fine; do not thaw them. You may need to add a minute or two to the baking time.
Fruit alternatives: Try chopped strawberries, blackberries, or raspberries if you like.