125gmashed ripe bananas½ cup, about 1–2 medium bananas
85gunsalted buttermelted (6 tablespoons)
135gbrown sugarpacked (⅔ cup)
100gsourdough discard⅓ cup
50glarge eggroom temperature (1 egg)
5gpure vanilla extract1 teaspoon
30gmilk2 tablespoons
For the cinnamon streusel
100ggranulated sugar½ cup
60gall-purpose flour½ cup
1gcinnamon½ teaspoon
57gmelted butter4 tablespoons
Instructions
Make the Cinnamon Streusel
Combine dry ingredients: In a small bowl, stir together the sugar, flour, and cinnamon.
Add butter: Pour in the melted butter and mix with a fork until crumbly. Set aside while you prepare the muffin batter.
Make the Muffins
Prep the oven: Preheat to 425°F (220°C) and line a 12-cup muffin pan with paper liners or lightly grease it.
Mix dry ingredients: In a medium bowl, whisk together the flour, baking powder, baking soda, salt, and pumpkin pie spice.
Make the batter: In a large bowl, whisk together pumpkin puree, mashed bananas, melted butter, sourdough discard, brown sugar, egg, vanilla, and milk until smooth and well combined.
Combine: Add the dry ingredients to the wet ingredients and gently fold until just combined—don’t overmix.
Assemble: Divide the batter evenly among the muffin cups, filling each almost to the top for bakery-style domes. Sprinkle the cinnamon streusel generously over the tops.
Bake (two temperatures): Bake at 425°F for 5 minutes, then (without opening the oven) reduce the temperature to 350°F (175°C) and bake for an additional 14–16 minutes, or until a toothpick inserted in the center comes out clean.
Cool: Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
Notes
I bake by weight for accuracy. Cup measurements are approximate and may vary depending on how you scoop.Audrey’s Tip: Filling the muffin cups nearly to the top and starting with a blast of heat at 425°F helps the muffins rise tall with gorgeous bakery-style domes. Don’t open the oven when lowering the temperature—keep that heat trapped for the best lift!