Pre heat your oven to 170c fan. Get all your ingredients at room temperature and line your muffin tin with cases.
Add all dry ingredients into a mixing bowl (oats, plain flour, light brown sugar, baking powder, bicarb and cinnamon). Mix this all together until it is evenly combined.
Add in the raisins and mix again until the raisins are coated in the flour mixture.
Make a well in the middle and add in the wet ingredients (melted butter, eggs and oil).
Next, mash the bananas with a fork. Into the banana mixture, add in the vanilla extract, whole milk, and mash again. Add this to the wet ingredients.
Whisk this all up for 30-40 seconds until it is mixed through.
Using an ice cream scoop, add a full scoop of batter into the muffin trays. Cook at 170c fan for 20 minutes, until light golden in colour. You can insert a skewer too. If this comes out clean, they are cooked. Leave to cool for 30 minutes.
Eat as it is or drizzle over some melted dark chocolate and add a slice of banana to serve.
