Bake Play Smile
Add the self-raising flour, vegetable oil, milk, egg and caster sugar to the grated apple. Mix until combined.
Divide the mixture into the paper cases, filling each case to ⅔ full.
Place the plain flour, rolled oats, brown sugar, butter and ground cinnamon in to a clean bowl. Mix well until the ingredients are combined and you have a dry crumbly mixture.
Sprinkle the crumble mix evenly over the top of the unbaked muffins. Bake in the oven until golden and crunchy on top and cooked through.