Preheat the oven to 350°F. Line a standard muffin pan with parchment paper muffin liners or grease the muffin pan with oil. Do not use regular muffin liners.
In a small bowl, stir together the flour, baking powder, baking soda, and salt until combined.
In a large bowl, whisk the eggs until blended. Whisk in the banana, yogurt, brown sugar, and vanilla until combined, then fold in the dry ingredients until no flour pockets remain. Fold in the blueberries.
Divide the batter in the prepared muffin tin. Bake in the preheated oven for 18-20 minutes, or until the muffins are golden brown on top and a toothpick inserted in the center comes out clean.
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Notes
Storage: Store any leftovers in an airtight container. They will last about 7 days in the fridge.Make Ahead: You can make the muffins ahead of time and freeze them for up to 3 months. When ready to eat one, just microwave it for 30 seconds to one minute and enjoy.For the previously published vegan version:1 ½ cups all purpose flour⅓ cup cane sugar½ cup rolled oats1 teaspoon baking soda½ teaspoon baking powder½ teaspoon salt1 ⅓ cups mashed very ripe banana ⅓ cup almond milk⅓ cup coconut oil melted2 tablespoons ground flaxseed2 tablespoons maple syrup½ cup fresh blueberries