STEP 3/4
Put the powder in a sieve and mix it as if cutting it, then add the shower cream, stir-fry until you can't see the raw powder, and mix lightly.
STEP 4/4
Remove the crumble from the refrigerator, sprinkle evenly over the dough, and sprinkle with walnuts. Bake in a preheated oven at 170 degrees for 35 to 40 minutes.