Preheat oven to 180°C. Line 2 trays with baking paper.
flour, cinnamon, ginger, nutmeg, salt, baking powder and sugar into the Thermomix bowl.
Add butter. Combine 20 sec/speed 6 or until combined fully.
Add the remaining ingredients and combine 20 sec/speed 6. Scrape bowl and repeat.
Pipe or spoon small portions of the dough on the baking trays. They expand in the oven quite a lot so depending on the size cookie you are after, be aware, perhaps bake a test one first.
Bake for 8 - 10 minutes. They're ready when they bounce back when you press an edge with a fingertip. Cool.
To make the filling, place butter into the Thermomix bowl. Chop 20 sec/speed 6 or until soft. Add remaining ingredients and combine 10 sec/speed 6. Scrape bowl and repeat.
Pipe or spread filling on half of the cookies. Sandwich with the other half.
Store in the fridge or freezer until ready to eat!