Preheat the oven to 170°C and lightly grease 24 mini muffin tin holes.
In a mixer with a paddle attachment attached, place all the ingredients except the jam and mix until a dough has formed - it will not take too long and you don't want to over mix.
Divide the dough up into 24 equal sized balls and place in the muffin holes. Place in the oven and bake for 15 - 20 minutes or until golden brown.
Remove from the oven and leave to cool for 10 minutes. Using the back of a wooden spoon, make a little hole in the centre of the warm shortbread.
Remove the shortbread while still warm and place on a cooling rack and allow to cool completely. Once cooled add some jam to the centre of each shortbread biscuit and then dust with a bit of icing sugar.