Preheat the oven to 190°C (375°F) and line a 12-cup muffin tin with paper liners.

In a large bowl, whisk together the self-raising flour and baking powder.

Stir in 75g of the grated cheddar cheese, reserving the rest for topping.

In a separate jug, whisk the egg, milk, melted butter, and Marmite until the Marmite is mostly dissolved.

Make a well in the center of the dry ingredients and pour in the liquid mixture.

Fold gently until just combined; do not overmix or the muffins will be tough.

Spoon the batter evenly into the muffin liners.

Sprinkle the remaining cheese over the top of each muffin.

Bake for 18 to 22 minutes until golden brown and a skewer inserted comes out clean.

Transfer to a wire rack to cool slightly before serving.