(A clever thing to do is to have a template with evenly spaced circles that you can slip under the greaseproof paper when piping the macarons; then you can just slide it out when you are finished ...

806) into a disposable piping bag, push the tip to the bottom, and fill the bag with the macaron batter. Put the parchment template on a sheet tray and place a silicone baking mat on top.