Pre-heat the oven to 170 C / 340 F
Mix the dry ingredients in a bowl, and mix together.
In a separate bowl whisk the milk,oil, egg and vanilla, until well blended. Pour this Mix together until JUST combined. Do not overmix. It will become tough.
Use a muffin tray ( mini or larger) and cupcake papers to fit . Half fill each muffin case then using a teaspoon, spoon a teaspoon of mince onto the top of each . Cover this mince mixture with a spoonful of muffin mixture.
Bake these for approximately 20 minutes, or until slightly risen and firm to touch.
Cool on a cake rack.
Paint the top of each muffin with butter and then dip each into caster sugar.