# What You'll Need:
→ Dough
01 - 1 cup (120 g) all-purpose flour
02 - 1 cup (100 g) sharp cheddar cheese, finely grated
03 - 1/3 cup (35 g) Parmesan cheese, finely grated
04 - 1/3 cup (80 g) unsalted butter, cold and cubed
05 - 1/2 cup (120 g) sourdough discard, unfed
06 - 1/2 teaspoon garlic powder
07 - 1/4 teaspoon onion powder
08 - 1/4 to 1/2 teaspoon fine sea salt, plus more for topping
09 - 1/4 teaspoon freshly ground black pepper
→ Topping
10 - 1 tablespoon Parmesan cheese, finely grated
11 - 1/4 teaspoon garlic powder
12 - Flaky sea salt for sprinkling
# Directions:
01 - In a food processor, pulse flour, cheddar, Parmesan, butter, garlic powder, onion powder, salt, and pepper until the mixture resembles coarse crumbs.
02 - Add sourdough discard and pulse until the dough just comes together without overworking.
03 - Turn dough onto a lightly floured surface and knead gently until smooth, about 1 minute.
04 - Shape dough into a rectangle, wrap in plastic wrap, and refrigerate for 30 to 60 minutes to improve texture and handling.
05 - Preheat oven to 350 degrees Fahrenheit. Line two baking sheets with parchment paper.
06 - Roll out dough to 1/8 inch thickness. Cut into 1-inch squares using a pastry wheel or sharp knife.
07 - Transfer squares to prepared baking sheets, spacing them slightly apart. Pierce the center of each square with a skewer or toothpick.
08 - Mix Parmesan and garlic powder for topping. Lightly brush crackers with water and sprinkle with the topping mixture and flaky sea salt.
09 - Bake for 16 to 18 minutes, rotating pans halfway through cooking, until crackers are golden brown and crisp throughout.
10 - Transfer crackers to wire racks and allow to cool completely before serving to achieve maximum crispness.