Cinnamon Cake

Ingredients:

180g soft butter
3/4 cup caster sugar
1 tsp vanilla extract
2 eggs
2 cups self-raising flour (or plain with 2 tsp baking powder)
2 tsp ground cinnamon
1/2 cup milk

Sugar topping
1 tbs caster sugar
1 tsp ground cinnamon
1 tbs melted butter