Place 75 grams of aquafaba in the bowl of a mixer with the cream of tartar.
Whip for about 1 minute on low, or medium low if the low on your mixer is way too slow. (On my hand mixer I whip on low, but on my KitchenAid I whip on medium low)
Fold until the batter is flowing slightly. You don’t want the batter to be flowing continuously off the spatula. When it comes to vegan macarons, the folding time is very very brief. You are basically just looking to incorporate the dry ingredients with the meringue. Please watch the video to see what the consistency should look like. If you grab a spatula full of batter and hold it over the bowl, it should still be separating in chunks, and not flowing continuously on a ribbon. Do not get to the ribbons stage! If you get to the ribbon stage, the macaron feet will spread out in the oven.
Aquafaba is the water you obtain from cooking chickpeas (or other legumes). The aquafaba I use is water drained from a chickpea can. I prefer low or no sodium chickpea water, mainly because of the taste, I feel like the salted chickpea water adds a weird taste to meringues and such. Some people like to boil their own chickpeas to obtain the aquafaba, and you can do that, but make sure to study what are the best ratios water:chickpeas so your aquafaba is concentrated enough.
Reduced aquafaba: I have recently stopped reducing the aquafaba to make my vegan macarons, and they have been working fine. I used to reduce the aquafaba for my previous vegan macarons, but I decided to start skipping this step to experiment, and the macarons have been turning out great. I still like to use low sodium chickpea water.
Macaronage: If you are acquainted with making regular (egg white) macarons, one of the clues about knowing when the batter is ready to be piped, is when you can grab some batter with the spatula and start drawing a figure 8, if the batter doesn’t break up as you draw a few figure 8 shapes, that means the batter should be ready. However, I am learning with vegan macarons that it’s optimal to stop folding the batter right before it reaches this stage. Please watch my videos on youtube, as you can see in the videos what the batter should look like.
If the batter is too thick while mixing, add a teaspoon of aquafaba as you mix, until you obtain the perfect consistency.
Macaronage: Do not let the batter reach ribbon stage. If it reaches ribbon stage it will be over mixed, the batter is supposed to be thick. Watch my videos on YouTube to see what it should look like.
Oven thermometer: Please make sure to have an oven thermometer! I receive a lot of troubleshooting questions and the great majority are issues caused due to not having an oven thermometer. Read this post for more detailed information about how important this is.
Oven temperature: Please experiment with your own oven temperature. Temperatures will vary depending on your oven and technique. It’s important to experiment and see what works best for your own oven. In my old oven I used to bake this same recipe at 310ºF. However, with my new oven, I bake it at 285ºF. This comes to show that the temperature will vary greatly depending on your own oven. Please experiment and find out what works best for you.
Troubleshooting: if your macarons are exploding, flattening out, with the feet spreading to the sides, that can mean a few things:
1- hot oven (make sure to have oven thermometer and experiment with the optimal oven temperature for your oven).
2- over mixed batter. It's really easy to over mix vegan macaron batter. Mix it just until it starts to flow. Watch the videos on my youtube channel for reference.
3- under whipped meringue: make sure the meringue has really stiff peaks. It can take some time. Just be patient.