
First make the pie crust. Mix together the dry ingredients in a large bowl. You have two options when adding the butter. 1) You could cut the butter into pea-sized pieces over the bowl. But this method usually means holding the butter in your hand which will warm it up, thus making less cold-induced flakiness. Or 2) You could cut the stick into general 2-inch cubes on a cutting board, add the butter cubes to the bowl and toss them to coat in the dry ingredients (this helps protect them from the warm air) and use this dough scraper to chop the butter cubes into smaller bits that are roughly pea-sized. This method is better because it keeps the butter colder longer.
Add the rosewater, then begin adding the tablespoons of ice water while stirring gently. Grab a handful of the mixture and squeeze. If it generally sticks together when you let go, it is fine. If it completely crumbles apart, it needs a bit more water.
Grease a pie pan and set it aside. Roll it out into a 1 cm thick circle onto a lightly-floured surface. Place it in the pie pan, trim excess crust, and cut out designs with a cookie cutter to place around the edge of the crust (optional). Secure the decorations by putting a spot (about 1/4 teaspoon) of melted butter on the back of the decorative dough piece and pressing down gently when placing it on the crust's edge. Cover and place the crust shell in the refrigerator until use.