Preheat your oven to 180C.
Mash bananas with sugar.
Add oil, vanilla essence, milk, sourdough discard and coconut oil.
Mix well and set aside.
Mix wheat flour, oats, baking powder and salt.
Add it to the liquid ingredients and gently mix everything. Do not over mix.
Drop batter into muffin moulds.
Bake in preheated oven for 30 minutes or until a tooth pick inserted comes out clean.
Remove from oven, cool for two or three minutes and remove from mould.
Serve it warm.