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a unwrapped sourdough banana muffin with a oat crumble on a wood cutting board with oat crumble surrounding the muffin. There is a tray of muffins in the background
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Sourdough Banana Muffins

The softest and yummiest sourdough banana muffins you’ve ever tasted. A light and fluffy banana muffin, topped with a crunchy and sweet oat crumble.
Course Sourdough
Cuisine American
Keyword baking, muffins, sourdough, sourdough banana muffins
Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings 18 muffins
Calories 232kcal
Author Lisa Bass

Ingredients

  • 1/2 cup melted unsalted butter
  • 1 cup dark brown sugar
  • 3 ripe bananas 350g
  • 2 large eggs
  • 1/2 cup sourdough starter discard*
  • 1 teaspoon vanilla

Dry Ingredients

  • 2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 2 teaspoons baking powder
  • 1 teaspoon salt

Crumb Topping (Optional)

  • 1/2 cup brown sugar
  • 1/2 cup oats
  • 2 tablespoons flour
  • 4 tablespoons softened unsalted butter
  • 1 teaspoon cinnamon

Instructions

  • Preheat the oven to 350 degrees.
  • Melt butter in a microwave safe dish, in a saucepan, or small cast iron pan.
  • Lightly grease a muffin tin or line with cupcake liners.
  • In a stand mixer with a paddle attachment or a bowl, mix together melted butter and brown sugar for five minutes.
  • Turn off the mixer and add in eggs, vanilla, mashed banana, and sourdough starter.
  • In a separate bowl, stir together dry ingredients (flour, baking soda, baking powder, and salt) well.
  • Add in dry ingredients 1/3 at a time and mix until just incorporated. You don’t want to over-mix.
  • Add equal amounts of batter to each muffin well. I like to use an ice cream scoop for this.
  • Top each muffin with the oat crumble.
  • Bake for 20-25 minutes or until a toothpick or cake tester comes out clean.
  • Allow the muffins to cool completely. Enjoy

Notes

  • * If you want to long ferment this recipe, add an extra 1/2 cup of sourdough starter to. Otherwise the batter won't be moist enough for the ferment. Long fermented directions in the post above.
  • For a more tangy flavor, use sourdough discard that hasn’t been fed in a day, or allow to long ferment. For a less tangy flavor, use an active sourdough starter.
  • Crumble topping is optional, but adds a super yummy flavor and texture.
  • I highly suggest serving them warm. They taste best, in my opinion, right out of the oven.

Nutrition

Calories: 232kcal | Carbohydrates: 37g | Protein: 3g | Fat: 9g | Saturated Fat: 5g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 0.3g | Cholesterol: 41mg | Sodium: 311mg | Potassium: 130mg | Fiber: 1g | Sugar: 20g | Vitamin A: 278IU | Vitamin C: 2mg | Calcium: 52mg | Iron: 1mg