Line two baking sheets with parchment paper and preheat oven to 350 degrees.

In the bowl of a stand mixer, beat together butter and sugar. Add crushed candy canes, vanilla and salt. Gradually add flour, scraping down sides as nessecary.

Use a tablespoon to measure cookie dough and roll into a ball. Bake for about 10 minutes or until bottoms are light golden brown. Let cool 5 minutes and then roll in powdered sugar. Let cool completely and roll in powdred sugar again. Sprinkle with crushed candy canes. Store tightly covered for up to three days.