2large overripe bananas, mashed (about ¾ cup or 170g)
⅓cupneutral oil, such as vegetable or avocado oil (75ml)
½cupplain Greek yogurt (120g) (or sour cream)
⅔cuppacked brown sugar (135g)
2large eggs
1teaspoonvanilla extract
2cupsall-purpose flour (240g), plus more for the blueberries
1teaspoonbaking powder
½teaspoonbaking soda
½teaspooncinnamon
½teaspoonkosher salt
1 ½cupsfresh or frozen blueberries (do not thaw if frozen) (225g)
Instructions
Preheat and Prep: Preheat the oven to 375°F and line a 12-cup muffin tin with paper liners or grease well with nonstick spray.
Mix the Wet Ingredients: In a large bowl, mash the bananas until mostly smooth (a few small lumps are fine). Whisk in the oil, Greek yogurt, brown sugar, eggs, and vanilla extract until smooth.
Add the Dry Ingredients: Add the flour, baking powder, baking soda, cinnamon, and salt to the bowl. Fold with a rubber spatula until just combined, stopping as soon as no dry streaks remain (a few lumps in the batter are perfectly fine), being careful not to overmix.
Add in the Blueberries: In a small bowl, toss the blueberries with 1 tablespoon flour. Shake off any excess, then gently stir the blueberries into the batter until just combined.
Bake: Fill each muffin cup about ¾ full. Bake for 18-20 minutes until the tops are golden and a toothpick inserted in the center comes out clean or with just a few moist crumbs.
Let cool in the pan for 5 minutes before transferring to a wire rack.