Preheat your oven to 190 degrees celsius (fan-forced) and line two trays with baking paper
Place the butter and caster sugar into your Thermomix bowl and mix for 30 seconds on speed 5.
Scrape down the sides of the bowl and add the eggs and vanilla extract and mix for 20 seconds on speed 4 to combine.
Add the flour and baking powder and mix for 20 seconds on speed 4 or until combined. Stop after 10 seconds to scrape down the sides
Scoop up tablespoon sized balls of the cookie mixture and place onto your prepared baking trays. Flatten the surface of the biscuits slightly and decorate with red and green M&M’s and place in the oven to bake for 12 – 15 minutes.
Carefully remove the cookies from the oven and let them cool on the baking tray for 5 minutes before carefully transferring them to a wire rack to cool completely.
Notes
It is important to use butter which has been softened. If the butter is too firm, it will take longer to combine with the caster sugar.This dough can be made up to two days in advance and stored in the fridge until required.In the lead up to Christmas you will find packs of Christmas M&M's at your local supermarket. Alternatively, you can pick out the red and green M&M's from a regular pack.Gently push the M&M's down into the dough, this will slightly flatten the biscuits.To store, place in an airtight container for up to one week. In warmer climates the biscuits may begin to soften after 3 -4 days.Both the uncooked dough and baked biscuits can be frozen for up to two months.