Preheat oven to 180°C.
Sift flour into a bowl and stir in sugar. Whisk together egg, milk and melted butter. Pour into dry ingredients and mix until just combined. Do not over–mix.
Add ingredients for preferred variation. Spoon the mixture into a 12 capacity muffin tin lined with muffin cases and bake at 180°C for 20 minutes or until golden and cooked through.
Cool for 5 minutes before removing from pan and cool slightly on a wire rack.