Combine flour, sugar, and salt in the bowl of a food processor.
Pulse a few times to mix.
Add butter, a little at a time, pulsing after each addition.
Add water in small amounts, pulsing after each addition, until the mixture forms a cohesive dough.
Remove dough from food processor.
Roll to ⅜ inch thick between 2 lightly floured pieces of parchment.
Cut out stars using a variety of sizes of star-shaped cutters.
Remove excess dough.
Place stars on a sheet pan lined with parchment paper and freeze until you need them.