Sourdough discard biscuits with flaky layers and flaky sea salt on top

Sourdough Discard Biscuits

Flaky, buttery biscuits with a real sourdough tang. Cut-and-stack lamination builds hundreds of layers. Ready in under 40 minutes.

Yield9–12 biscuits
Prep20 min
Bake15–18 min
DifficultyBeginner

Ingredients

  • 240g all-purpose flour · 2 cups
  • 12g baking powder (aluminum-free) · 1 tablespoon
  • 2g baking soda · ½ teaspoon
  • 5g kosher salt · 1 teaspoon
  • 4g granulated sugar · 1 teaspoon
  • 113g unsalted butter, frozen · 8 tbsp (1 stick)
  • 120g sourdough discard · ½ cup
  • 120g cold buttermilk · ½ cup

Finishing

  • 28g unsalted butter, melted · 2 tablespoons
  • 2g flaky sea salt · ½ teaspoon

Method

  1. Freeze butter at least 30 minutes. Preheat oven to 425°F (220°C), rack in upper third.
  2. Whisk discard and cold buttermilk together until uniform. Refrigerate.
  3. Whisk flour, baking powder, baking soda, salt, and sugar in a large bowl.
  4. Grate frozen butter into dry ingredients on large holes of a box grater. Toss quickly to coat.
  5. Add the wet mixture and fold with a spatula until a shaggy dough forms.
  6. Turn out, pat to 1 inch. Cut into 4 squares, stack them, press back to 1 inch. Repeat once more.
  7. Pat to a 7×9-inch rectangle, 1 inch thick. Cut into squares or use a floured round cutter.
  8. Place biscuits touching on a lined sheet. Optional: freeze 15 minutes before baking.
  9. Bake 15–18 minutes until deep golden. Brush with melted butter and sprinkle flaky salt.

Henry's Tip

Use discard up to 2 weeks old from the fridge. Older discard means more tang. The acids in the discard react with the baking soda for a subtle, complex flavor you won't get from buttermilk alone.