2 tbsp unsalted butter, softened and cubed (28g, 1 oz)
Method
Preheat the oven to 200 C and line a 12-hole muffin tin with paper liners.
To make the crumble topping, mix together the oats, brown sugar and cinnamon in a small bowl. Add the butter and use a fork to crumble it together. Set aside.
Peel, core and dice the apples into 1cm (1/2 inch) cubes. Set aside.
To make the muffins, combine the flour, sugar, cinnamon, baking powder and salt in a large bowl. Make a well in the center.
In a jug, whisk together the oil, egg and milk. Pour it into the well in the dry ingredients and mix gently, with a wooden spoon or spatula, until the flour is just incorporated. Stir through 1 cup of the apples.
Fill the muffin liners ⅔ full with batter. Top the muffins with the remaining chopped apple and sprinkle generously with cinnamon sugar crumble.
Bake for 20-25 minutes or until a skewer inserted comes out clean.
Your house will smell amazing. Makes 12 regular muffins.
Recipe by Butter Baking at https://www.butterbaking.com/2012/04/15/apple-pie-muffins/