Thin, crispy, and irresistibly snackable crackers. The easiest and most delicious way to use up sourdough discard.

Preheat oven to 350°F (175°C).
Combine the discard, melted butter, flour, and salt in a bowl. Mix until a smooth dough forms. Add any optional seasonings.
Divide dough in half. Place one half on a piece of parchment paper and top with another piece of parchment.
Roll out as thin as possible — you want these nearly see-through. The thinner, the crispier.
Remove the top parchment. Sprinkle with flaky salt and any additional toppings.
Transfer the parchment with the dough directly onto a baking sheet.
Bake for 15-18 minutes until golden brown and crispy. Watch carefully — they go from perfect to burned quickly.
Let cool completely on the pan (they crisp up even more as they cool). Break into rustic pieces.
Repeat with the second half of dough.