Preheat oven to 375 degrees F.
In a food processor, pulse the pretzels to make 3/4 cup of crumbs. Add the sugar and pulse to combine. Add the butter and mix well.
Transfer to a 9-inch springform pan, pressing onto the bottom and slightly up the sides. Bake until set, about 6 minutes. Remove from the oven and let cool on a wire rack.
Yield: 1 (9-inch) crust