Place banana, oats, baking powder, maple syrup, egg and Biscoff in a bullet blender or small food processor.
Blend until smooth.
Place in the microwave for 1:30 minutes. Or in a preheated oven for 25 minutes at 180c/350F.
Times may vary, so check that it is cooked through.
Optional: Drizzle with some extra Biscoff spread to serve.
Notes
Store covered in the fridge covered for up to 3 days.Split in half to split the calories, but note cooking times may vary if halved.Tip: Add in a little milk if a smoother texture is needed. The size of the banana, how ripe it is, or the size of the egg can affect the end texture, so a little milk may be needed.