Prepare the cinnamon sugar. Mix sugar and cinnamon together and set aside.

Preheat oven to 220°C. Spray or brush 12 non-stick muffin pans with butter or oil.

To make the muffins, sift flour, baking powder and cinnamon into a mixing bowl. Stir in sugar.

Melt butter in a small bowl in the microwave for approx. 40 seconds.

Beat eggs and milk together.

Pour liquid mixture with apple and melted butter into dry ingredients. Gently stir with a spoon until just combined. The mixture should look sflightly lumpy.

Spoon mixture evenly into pans. Fill to ¾ of the way up. Sprinkle over the cinnamon sugar.

Bake in oven for 15-20 minutes or until muffins spring back when pressed lightly.

Leave muffins in pans for 5 minutes before turning out on wire rack to cool.