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costco banana muffin recipe

Banana Muffin Recipe

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Prep Time 15 minutes
Cook Time 23 minutes
Total Time 38 minutes
Servings: 12 servings
Ingredients Method Notes

Ingredients
  

  • 3 very ripe bananas (about 1½ cups mashed)
  • 2 cups all-purpose flour
  • 1 tsp baking soda
  • 1 tsp baking powder
  • ½ tsp fine salt
  • 1 tsp ground cinnamon
  • ¾ cup granulated sugar
  • 2 large eggs
  • ½ cup sour cream
  • ⅓ cup neutral oil
  • 1 tsp pure vanilla extract
  • 2 tbsp turbinado sugar

Method
 

  1. Mash the 3 ripe bananas in a large bowl until mostly smooth, about 1½ cups total.
  2. Add the 2 eggs, ⅓ cup oil, ½ cup sour cream, ¾ cup granulated sugar, and 1 tsp vanilla extract to the banana and whisk until smooth.
  3. Add the 2 cups flour, 1 tsp baking soda, 1 tsp baking powder, ½ tsp salt, and 1 tsp cinnamon; fold with a spatula just until no dry streaks remain, about 15 to 20 folds.
  4. Preheat oven to 425°F (220°C). Line a 12-cup muffin tin and divide the batter among cups, filling each nearly to the rim. Sprinkle 2 tbsp turbinado sugar evenly across all 12 muffins.
  5. Bake at 425°F (220°C) for 5 minutes, then reduce to 350°F (175°C) and bake for another 15 to 18 minutes until a toothpick comes out clean.
  6. Cool in the tin for 5 minutes, transfer to a rack, and serve warm with domed tops up.

Notes

These muffins taste even better the next day, once the banana flavor has had a chance to settle. If your bananas are only lightly spotted, leave them on the counter for another day or two before baking. Mixing the batter a little at a time and stopping the moment the flour disappears is the single biggest thing you can do for a tender crumb.