These Apple Crumble Muffins are simple to make and so delicious! They are protein packed and have big chunks of apple throughout.
Preheat the oven to 180C and grease and line 8 holes of a standard muffin tray.
Peel the apple and chop it finely into small chunks.
In a large microwave safe bowl, melt the butter.
Stir in the caster sugar until smooth.
Add the egg, oil, milk and vanilla and stir until smooth.
Sift in the flowers, baking powder and salt and stir until the batter is smooth and everything is evenly incorporated.
Add in the chopped apple and stir into the mixture.
Divide the mixture evenly between the holes of the muffin pan.
In a blender, combine the oats and brown sugar for the crumble. Sprinkle this mixture over the top of each muffin.
Bake for 20-25 minutes or until the muffins are golden brown and an inserted skewer comes out clean.