Start preparing the dough. In a large bowl, sift the flour, add the salt, baking powder and yeast powder, mahlepi or mastic and mix thoroughly.
Knead the dough for a few minutes until the mixture is firm. If the dough is too wet, add a little more flour. Cover the dough mix with cling film and place in warm area for at least 2 hours or until it has doubled in size.
You could either add mahlepi or mastic to the dough or the filling. Some people add it to both, but I only used it for the dough.