Position the oven rack in the middle of the oven, and preheat to 356°F (180°C) (160°C fan).
In a bowl, mix together self-rising flour, milk, and grated cheese. Adding salt is optional, as some cheese can be quite salty, so you might not need it.
Optional: You can also include any of your favorite ingredients at this step, such as chopped chives, dried red chili flakes, chopped red bell peppers, sun-dried tomatoes, dried Italian herbs, freshly ground black pepper, or cayenne pepper.
Gently mix until a thick batter forms, taking care not to overmix. You only need to combine the ingredients until they're just blended.
Divide the batter equally into your lined muffin pan filling each up to ¾ full and bake for 18-20 minutes. (See note 2)
Remove from the oven and serve warm
Store leftovers in an airtight container for up to 2 days.
To reheat, microwave for 20 to 30 seconds, or slice in half and warm on a skillet over the stove.