Preheat your oven to 180c/350f.
Add the wet ingredients to a bowl & stir to combine.
Then stir in all of the dry ingredients.
Spoon the mixture evenly across a 12 muffin tray for large muffins or a 24 mini muffin tray.
Cook for 18-20mins for large muffins, or 15-16 minutes for mini muffins until a toothpick comes out clean.
Let the muffins cool in the tray for a few mins before removing and allow to cool before serving (use a spoon to help lift the mini muffins out).
If frosting, whisk this together while the muffins are baking and leave in the fridge to firm up.
Store in an airtight container in the fridge for 5 days or freeze fully frosted for up to 2 months.