First make sure your butter is straight from the refrigerator, you can even pop it into the freezer for 15 minutes prior to grating it.
Using a cheese grater on the largest setting, grate your butter and transfer to a bowl.
1 ½ cups (340g) unsalted butter
Note: You can also cut your butter up into 1/4 inch cubes if you don't have a cheese grater.
Add the flour, sugar, salt, and baking powder to the butter. Combine the ingredients until all of the butter coated.
3 cups (360g) all-purpose flour, 1 ½ teaspoons (7g) fine sea salt, 1 ½ tablespoons (18g) granulated sugar, 1/4 teaspoon baking powder
If the butter is sticking together or the chunks are too large, use a fork or dough blender to help break them up. You want little blueberry sized chunks of butter.
Add the sourdough discard and lemon juice to the bowl.
¾ cup (180g) sourdough discard, 1 ½ teaspoons (7g) lemon juice
Begin to mix with a pastry whisk or your hands to bring the dough together. If you need to, you can turn your dough out on a clean surface to mix it with your hands.
The ball of dough should come together easily, if it's too dry add a teaspoon of cold ice water at a time until your dough just comes together.
1-2 Tablespoons ice water
If the dough is too wet or sticky, sprinkle with a little flour and continue to bring the dough together.
I typically don't even need to use water, but it's okay and normal if you do!
Because your hands can melt the butter, it's important to just bring the dough together and then stop mixing. You want chunks of butter and overworking the dough isn't the goal.
Flatten the dough into a disc, and cut the dough in half (this doesn't have to be perfect just guess). You want to see the bits of butter throughout your dough, this is what makes those flakey layers!
Flatten each half into a round, then wrap tightly in plastic wrap and refrigerate at least 2 hours but optionally overnight for the best fermentation and the flakiest pie crust.