Make strawberry and pistachio dough.
For the strawberry dough, take one 1/4 size dough from step 1, add strawberry powder, red food color, and mix to combine. Sift cake flour over and combine with a spatula. Do not over-mix.
For the pistachio dough, take the remaining 1/4 size dough from step 1, add pistachio powder and mix, then add green food color and mix again. Sift cake flour over and combine with a spatula. Do not over mix.
Divide each dough into two pieces, wrap each with plastic wrap and rest in the refrigerator for 30 minutes.