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Preheat your oven to 400°F. Line a 12-cup muffin tin with paper liners or lightly grease each cup. Set aside.

In a large bowl, whisk together the all-purpose flour, rolled oats, granulated sugar, baking powder, baking soda, salt, and ground cinnamon (if using). Make sure there are no lumps and the ingredients are well combined.

In a separate medium bowl, mash the ripe bananas thoroughly with a fork or potato masher until mostly smooth. Add the lightly beaten large eggs, vegetable oil, and vanilla extract to the mashed bananas. Whisk until well combined.

Pour the wet ingredients into the dry ingredients. Stir gently with a spatula until just combined. Be careful not to overmix; a few lumps are perfectly fine. Overmixing can lead to tough muffins.

Gently fold in the fresh or frozen blueberries. If using frozen blueberries, do not thaw them first, as this can cause the batter to turn purple.

Divide the batter evenly among the 12 prepared muffin cups, filling each about two-thirds full.

Bake for 18-22 minutes, or until a wooden skewer or toothpick inserted into the center of a muffin comes out clean. The tops should be golden brown.

Remove the muffin tin from the oven and let the muffins cool in the tin for 5 minutes before transferring them to a wire rack to cool completely. Enjoy warm or at room temperature.


Preheat your oven to 400°F. Line a 12-cup muffin tin with paper liners or lightly grease each cup. Set aside.

In a large bowl, whisk together the all-purpose flour, rolled oats, granulated sugar, baking powder, baking soda, salt, and ground cinnamon (if using). Make sure there are no lumps and the ingredients are well combined.

In a separate medium bowl, mash the ripe bananas thoroughly with a fork or potato masher until mostly smooth. Add the lightly beaten large eggs, vegetable oil, and vanilla extract to the mashed bananas. Whisk until well combined.

Pour the wet ingredients into the dry ingredients. Stir gently with a spatula until just combined. Be careful not to overmix; a few lumps are perfectly fine. Overmixing can lead to tough muffins.

Gently fold in the fresh or frozen blueberries. If using frozen blueberries, do not thaw them first, as this can cause the batter to turn purple.

Divide the batter evenly among the 12 prepared muffin cups, filling each about two-thirds full.

Bake for 18-22 minutes, or until a wooden skewer or toothpick inserted into the center of a muffin comes out clean. The tops should be golden brown.

Remove the muffin tin from the oven and let the muffins cool in the tin for 5 minutes before transferring them to a wire rack to cool completely. Enjoy warm or at room temperature.
