Macaron Shells
Prepare 2 baking sheets with silicone mats, teflon, or templates and parchment paper. Fit a piping bag with a round piping tip. Set aside. Preheat oven to 285°F.
Pulse the almond flour and powdered sugar in a food processor and sift into a bowl. Discard any large chunks. Whisk the dry ingredients and set aside.
In a clean stand mixer bowl, add egg whites, sugar, and egg white powder (if using). Whisk to combine and place bowl over a double boiler. Heat, whisking regularly, until the sugar dissolves, about 60- 90 seconds. Remove the bowl from the double boiler and carefully dry off the bottom.
Place the bowl in the stand mixer and whisk on a medium speed (KitchenAid 4) until you almost have stiff peaks, 7- 10 minutes. Add your gel colors. Beat until you have stiff peaks, another 3- 5 minutes.
Add the dry ingredients to the bowl and begin folding the ingredients together. Once everything is combined, continue folding until the batter flows slowly like lava.
Pipe macaron shells onto prepared baking sheets. Let the macarons dry until you can lightly brush the tops with your finger (15 mins for me). Bake for 20- 22 minutes, rotating halfway through. Gently poke shell, if it is firm, remove from the oven to cool. If they wiggle, add another minute or two.
Let the macaron shells cool on the sheet for 10 minutes before transferring them to a cooling rack.
Turmeric Latte Buttercream
Beat butter with a hand mixer until soft and fluffy, about 5 minutes. Add the powdered sugar in 2- 3 additions, beating to combine between each.
Add pinch of salt and a tablespoon of milk. Beat on low to combine, then on medium for 1- 2 minutes. Add more milk a bit at a time until you have the right consistency.
Divide the buttercream in two equal portions. Combine the malted milk powder with a few drops of warm water and stir to dissolve. Add this mixture to one portion of buttercream and beat to combine.
Add the spices (turmeric through cinnamon) and gel colors to the remaining portion and beat until well combined.
Assemble
Pair up the macaron shells. Fill a piping bag with both flavors of buttercream (one on each side, or gently swirl them together). Pipe a swirl of buttercream onto one macaron shell and top with the other.
Drizzle the finished macarons with melted chocolate and top with edible gold leaf.
Place in an air tight container in the fridge overnight to let them mature. Remove 30 minutes before serving.