Place the Snowman macaron template paper on 2 baking sheets. Over the template, line the baking sheets with silicone mats or parchment paper. (Silicone mats are recommended for better air circulation.)
Sift together almond flour and powdered sugar using a fine mesh sieve. Scrape the bottom of the sieve with a spatula and discard any remaining large bits of almond flour. Set it aside.
In a large mixing bowl, beat the egg whites on low-medium speed until foamy.
When egg whites are foamy, add cream of tartar and salt and continue to beat.
Slowly sprinkle in 1-2 tablespoons of granulated sugar at a time and beat on medium speed. Allow the sugar to dissolve after each addition.
Continue beating the egg whites at the same medium speed until stiff peaks form.
Add half of the sifted almond flour mixture into the meringue and fold with a spatula until roughly incorporated. Fold in the rest of the almond flour until roughly combined.
Then continue to fold the batter until it’s runny enough. To test, scoop up some batter with the spatula and let it fall back down into the bowl. If the batter smoothly ribbons off the spatula without breaking, it’s ready. Be careful not to over-fold the batter.
To pipe macaron shells, transfer the batter into a piping bag with a small round piping tip. If you don’t have a piping tip, no worries! Just cut the tip off roughly about ½ inch.
Hold the piping bag vertically to the baking sheet and pipe the batter following the snowman template on the prepared baking sheets. Remember to remove the template paper from the baking sheets once the piping is complete!
Tap the baking sheets firmly on the counter a few times to eliminate any air bubbles. Use a toothpick to burst some large air bubbles that are brought up to the surface by tapping.
Let the macarons sit out on the counter for an hour or until they are slightly dry to the touch. When you touch the surface gently with your finger and nothing sticks, they are ready to go into the oven.
Place the oven rack on the middle shelf and preheat the oven to 300°F (150°C).
Working one baking sheet at a time, bake the macarons for about 15-18 minutes or until the tops are just slightly wobbly when pushed.
Cool the macaron shells completely on the baking sheet before removing them from the baking sheet to prevent breaking.