Preheat oven to 160°C. Line baking sheets with the paper templates, and top with the parchment paper
In a bowl of a food processor fitted with a metal blade, pulse 1/2 of the confectioner's sugar with the almond flour until a fine powder is formed. Transfer mixture to a mixing bowl and mix in the remaining confectioner’s sugar. Sift mixture three times into a large bowl. Set aside. This process is important, do not cut short this step!
To make the meringue: In a bowl of a stand mixer fitted with a whisk attachment, whip whites and cream of tartar on medium speed until foamy. Gradually add granulated sugar. Once all the sugar is incorporated and the mixture is thick, scrap down the sides of the bowl, add the vanilla extract, and increase the speed to high, whipping until stiff, firm, glossy peaks form for atleast 5-7 minutes.
You can remove and turn the whisk and the meringue should hold.
To complete the macaronnage step: Sift the almond flour mixture, one-third at a time, over the egg white mixture, and fold using a large spatula until just combined.
Add colouring to your batter
Now mix each batter, until the mixture is smooth and shiny. The batter should be firm, have a glossy shine and drip smoothly from the spatula. Take in the batter with your spatula and press it against the bowl in the same motion to remove the air from the batter. This step is very important. If you overwhip the batter will be too runny so do not overwhip. It should flow like lava, slowly but form ribbons.
Transfer the batter to a pastry bag filled with a 1/4 inch plain round tip, and pipe 1 inch rounds on parchment-lined baking sheets using a template for macarons or use a MACARON SILPAT to help get the round shapes. Gentle tap the bottom of each sheet on work surface to release trapped air OR you could bang the tray against the kitchen counter. Do this step atleast 10 times. If there is a bubble, use a toothpick to fill it up.
Let stand at room temperature for 45 minutes atleast. Check for a slight crust to form on the macaron. The macarons should not stick to your finger when lightly touched.
Bake one sheet at a time, rotating halfway through, until macarons are crisp and firm, about 15 minutes.
Allow macarons to cool on the baking sheets for 30 minutes and transfer to a wire rack to cool completely before filling.