Heat oven to 200C/180C fan/gas 6.
Line a muffin tin with cases.
Mix 100 g muesli with the light brown sugar, flour, and baking powder in a bowl.
Combine the milk, apple, oil, and 2 tablespoon nut butter in a jug, then stir into the dry mixture.
Divide equally between the cases.
Mix the remaining muesli with the demerara sugar, 1 tablespoon nut butter, and the pecans. Spoon over the muffins.
Bake for 25-30 minutes or until the muffins are risen and golden.

150 g muesli mix
50 g light brown soft sugar
160 g plain flour
1 teaspoon baking powder
250 ml sweetened soy milk
1 apple, peeled and grated
2 tablespoon grapeseed oil
3 tablespoon nut butter
4 tablespoon demerara sugar
50 g pecans, roughly chopped