Make a syrup with the sugar and apple juice. Reach 118°C
Add the syrup to the egg whites and continue whisking (Italian meringue technique) Add the coloring at this point.
Heat the gelatin in the microwave for 20 seconds.
Add the gelatin to the previous meringue and keep whisking until cold.
On a sheet place in equal parts the powdered sugar and powdered milk, place with the help of a piping bag the marshmallow and powder above a bit more of the three powders. Let dry and cut.