Place two Silpat mats in two large baking pans and print out this strawberry macaron template. Set aside. Pour 110g of aged egg whites and a pinch of cream of tartar into the bowl of a stand mixer with a whisk and mix on a medium speed until the surface is covered with small bubbles and looks opaque.
Add 110g of granulated sugar to the eggs and mix on a medium-low speed (speed 4 on a KitchenAid Mixer) for 30 seconds. Increase the mixing speed to a medium-high speed (speed 6 on a KitchenAid Mixer). Keep mixing until stiff, glossy peaks form. This usually takes me about 4-6 minutes.
Sift 140g superfine almond flour, 125g powdered sugar, and 5g of freeze-dried strawberry powder into a large bowl and set aside.
Fold the dry ingredients into the meringue using a circular motion. Once the dry ingredients are mostly incorporated into the meringue, place about 2/3 of a cup of batter in a separate bowl and add a drop of neon green gel food coloring.
If you want to make both pink and red strawberries like I did, divide the remaining batter evenly between two bowls and add a small squirt of pink gel food coloring to one, and a very generous squirt of red gel food coloring (1/2 tsp) to the other. If not, just add a very generous squirt (1/2 tsp) of red gel food coloring to the remaining batter. Mix both bowls until the ingredients are combined and a thick ribbon of batter runs off the spatula when it's lifted. Be careful not to over-mix the batter! I like to mix both batters slightly less than normal, so that they have a little more dimension and keep their shape better!
Pour the red and pink batter into large piping bags fitted with a medium-sized round piping tip (like a Wilton 10). If you don't have that size of piping tip, you can cut a 1/4 inch or about 1/2 cm opening at the base of the piping bags. Seal the top with a rubber band or clip and set aside (and angle the tip of the bag upward so that macaron batter doesn't flow out as it sits). Pour the green batter into a small piping bag fitted with a small round piping tip like a Wilton 5. If you don't have that size of piping tip, you can cut a 1/8 inch or about 2mm opening at the base of your piping bag. Seal the top with a rubber band or clip and set aside.
Place the template (if you chose to use it) beneath one of the Silpat mats before piping, and remember to remove it from the pan once you’re done piping. Pipe these one tray at a time. Start by piping the berries (wait to add the green top). Bang the pans firmly on the counter a few times to release air bubbles, then pop any remaining air bubbles that come to the surface with a scribe or toothpick. Then sprinkle white or yellow nonpareil sprinkles over the red part of each shell to look like strawberry seeds. I only added sprinkles to half of the shells since the other half won't be visible because they'll be the bottom of each macaron. But you can add them to all if you prefer!
Pipe the green tops above each strawberry using the green macaron batter. I recommend not banging the pans again after adding this part, so that the strawberry tops can have a bit more definition.
Let the macarons rest for 30 minutes to develop a skin. The macarons should look matte once the skin has formed. As the macarons rest, preheat your oven to 315 F.
Bake one tray of macarons at a time on the middle rack of your oven for 18-20 minutes, and rotate your pan halfway through. I also place a large piece of foil over the tray halfway through baking them to prevent them from browning. This helps them keep their color a lot better. Just be careful to kind of tent the foil upward, so that it isn't resting directly against any of the macarons.
Remove from oven and let the macarons cool on the pan (about 15 minutes), then gently remove them from the mat.
The additional decorations are optional, but you can use green and white royal icing (I made a half batch of the royal icing in this recipe) to add details to the leaves and create little blossoms once the shells are fully cooled.