Preheat oven to 350°F (175°C).
Blend the rolled oats until very fine, like flour.
In a large bowl, mix together pumpkin puree, banana puree, sourdough discard, Greek yogurt, eggs, flax mixture, and oil.
Stir in oat flour, wheat bran, baking powder, and pumpkin spice until just combined.
Batter should be thick but pipeable or scoopable. If too thick, add a splash of milk or water. If too thin, sprinkle in a bit more oat flour.
Pipe small dollops or spoon onto a parchment-lined baking sheet.
Bake 10 minutes, then turn off the oven and let sit inside for another 8–10 minutes to gently finish cooking.
Cool completely on a wire rack before storing.
2 banana version
Texture outcome
Freezing tips