Sourdough Banana Cinnamon Streusel (Printable Version)

Moist banana muffins enriched with sourdough discard and topped with crunchy cinnamon streusel.

# Ingredient List:

→ Muffins

01 - 1 cup mashed ripe bananas (about 2 large)
02 - 1/2 cup sourdough discard, unfed
03 - 1/2 cup granulated sugar
04 - 1/4 cup unsalted butter, melted
05 - 1/4 cup vegetable oil
06 - 2 large eggs
07 - 1 teaspoon vanilla extract
08 - 1 1/2 cups all-purpose flour
09 - 1 teaspoon baking powder
10 - 1/2 teaspoon baking soda
11 - 1/2 teaspoon salt
12 - 1/2 teaspoon ground cinnamon

→ Cinnamon Streusel

13 - 1/3 cup light brown sugar, packed
14 - 1/4 cup all-purpose flour
15 - 1/2 teaspoon ground cinnamon
16 - 2 tablespoons unsalted butter, melted
17 - Pinch of salt

# Directions:

01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or grease lightly with nonstick spray.
02 - In a large bowl, whisk together mashed bananas, sourdough discard, sugar, melted butter, oil, eggs, and vanilla until well combined.
03 - In a separate bowl, whisk together flour, baking powder, baking soda, salt, and cinnamon.
04 - Gently fold the dry ingredients into the wet mixture, mixing just until no dry spots remain. Do not overmix.
05 - Divide the batter evenly among the muffin cups, filling each approximately 3/4 full.
06 - Mix brown sugar, flour, cinnamon, melted butter, and salt in a small bowl until the mixture becomes crumbly.
07 - Sprinkle the streusel mixture evenly over the muffin batter in each cup.
08 - Bake for 20 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
09 - Allow muffins to cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.

# Expert Tips:

01 -
  • You finally have a reason to stop feeling guilty about that sourdough discard piling up in your fridge.
  • The texture is shockingly moist without being gummy, and the streusel adds just enough crunch to keep things interesting.
  • They're ridiculously easy to throw together on a weekday morning, but fancy enough to bring to someone's house.
02 -
  • Overmixing the batter is the most common mistake—you want to mix just until the dry ingredients disappear, not until everything is perfectly smooth and uniform.
  • If your muffins turn out dense, it's usually because the batter was mixed too much or your flour was packed too tightly into the measuring cup, so spoon and level next time.
03 -
  • Brown and mash your bananas while still in the peel if they're not quite soft enough—a few minutes in a warm oven softens them right up.
  • The streusel is best when baked on top of the batter fresh, but if you make it ahead and it hardens, just re-melt the butter and remix it before using.
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