Preheat your oven to 350°F (175°C) and line a large baking sheet with parchment paper.

Melt the unsalted butter in a heat-safe bowl and allow it to cool slightly.

Combine the sourdough discard with fine sea salt and mix well until smooth.

Add the finely shredded medium cheddar cheese to the mixture and stir thoroughly.

Spread the mixture onto the prepared baking sheet into a thin layer.

Sprinkle the top lightly with flaky sea salt and additional seasonings if desired.

Bake in the preheated oven for 10 minutes.

Remove from the oven and score into squares using a pizza cutter.

Return to the oven and bake for an additional 20 minutes or until golden brown.

Allow to cool on the baking sheet for at least 10 minutes before transferring to an airtight container.