Preheat oven to 425 Grease muffin pan, cavities and top Beat oil and sugars until combined Add eggs, one at a time, beating well after each Add baking powder, baking soda, cinnamon, coves and salt, mix well In a small bowl, whisk together pumpkin puree and milk Add to flour mixture Spoon batter into tins, filling almost all the way to the top Bake for 15-17 mins Cool in pan for 2 mins Turn onto cooling rack to cool In another small bowl, stir together sugar and cinnamon. In another small bowl, melt the butter. Dunk each muffin top down in the butter, roll in the sugar mixture