In a large mixing bowl, whisk together the whole wheat flour, baking powder, sugar and salt until combined.
140 grams Whole Wheat flour, 4 grams baking powder, 7 grams sugar, 6 grams salt
Add cubed, cold butter to the flour mixture and press the butter into the dry ingredients until the butter is in pea-sized pieces and covered in flour.
57 grams unsalted butter, cold
Pour in the sourdough discard and mix with a spatula until a dough is formed.
240 grams sourdough discard
Divide the dough into two pieces. Roll each half of the dough in a round dough ball, flatten, and cover with plastic wrap. Chill the cracker dough for at least 30 minutes or overnight to long-ferment.
When ready to bake, preheat the oven to 350 degrees F.
Remove one of the discs from the fridge and let rest for 10-15 minutes for easy rolling.
Place the dough on a lightly floured piece of parchment paper, then cover it with another piece of parchment paper. Roll the dough out until a large rectangular shape. Be sure to roll the dough as evenly as possible for even baking. Peel off the top sheet of parchment paper. With a pizza cutter or sharp knife, slice the dough into about 40 crackers. Brush the top of the dough lightly with olive oil and sprinkle with flaky salt. Gently press the salt into the dough. Poke holes into each cracker with the prongs of a fork.
olive oil, extra flavor variations below
Slide the cracker dough on the parchment paper onto the baking sheet. Bake for 20-25 minutes, rotating halfway, or until the crackers are golden brown. Know that the edge crackers may bake faster than the rest. Remove if browning faster than the rest and continue to bake the remaining crackers. Repeat with the remaining dough.