Line two baking trays with parchment paper. I use a macarons mat under it too.
Prepare a large piping bag with an Ateco 845 tip.
In the small saucepan, add water, agar, apple sauce, and sugar 1. Stir well.
Over medium heat, bring the mixture to a boil. Boil for 5 min. Use a timer.
Meanwhile, in the mixing bowl of a stand mixer, beat the egg whites and whisk on low speed until foamy.
Gradually add sugar two and whip on medium speed.
Cooking syrup should be thicker after 5 minutes of boiling. Check with a thermometer; the temperature should be 103 °C- 105 °C.
Slowly pour the syrup into the meringue while the mixer runs at medium speed. Do not pour syrup on the whisk; aim it toward the side of the bowl.
When the syrup is all poured in, increase the speed to high and whip for 2 minutes.
Transfer into the prepared piping bag and pipe 2-inch round rosettes on the parchment paper.
Let Apple Zephyr sit for 4-5 hours, then dust with powdered sugar.
Video
Notes
Prepare all tools and ingredients before making this recipe, as you need to pipe fast. Zephyr is stabilizing very fast.Apple sauce can be substituted with any fruit puree or juice.