Whiz up your tea leaves or attack them in the mortar pestle until fine. If you are a hethan who drinks tea dust from bags, it will be fine as is (sorry, tea and coffee are my snob things!) Then chuck everything in the stand mixer and beat the bajeesus out of it. Roll out (on baking paper makes life nice and easy) to half a cm thick and cut out biccies. Bake at 150 deg cel until bottoms just begin to brown.

If you want to ice, pop and extra tsp of tea in a cup with 4 tsp boiling water and let steep. Drain off liquid and mix in enough icing sugar to make it a nice consistency.