Preheat the oven to 190 C, Fan 180, Gas 5. Oil a non stick 12 hole muffin tin. Coarsely grate 100g of the cheese and cut the rest into 12 equal sized cubes.
Combine all the dry ingredients in a mixing bowl and add the eggs, buttermilk, milk, oil, grated cheese, chilli and coriander. Divide between the holes in the muffin tin. Push a cheese cube into the centre of each.
Bake for about 20 minutes until risen and smelling delicious. Remove from the oven and cool slightly on wire racks, but eat while still warm.