10ozall-purpose flour(2 1/4 cup lightly spooned and levelled)
1 ½tsp baking powder
½ tspbaking soda
½tspsalt
3ozcold butter (6 tbsp)
11oz by weightbuttermilk(1 1/3 cups)
Instructions
Preheat oven to 425ºF. Line a rimless baking sheet with parchment paper.
In a large bowl, whisk together the flour, baking powder, baking soda and salt.
Grate the butter into the flour mixture and whisk again to combine.
Measure in the buttermilk and switch to a wooden spoon or silicone spatula to fold the ingredients gently together until a shaggy dough forms. It will not be totally uniform, and that's ok.
Spoon dough on to prepared baking sheet. You'll have 5 5-oz biscuits. Bake 10 minutes, rotate pan, and bake 8-10 minutes more, until golden and tops feel springy (not soft) when you gently press down on the centre.
Notes
It's easiest and most accurate to use a scale. See notes in the post above. You can make smaller biscuits, simply cut the baking time down. Start checking doneness at 12 minutes for biscuits half the size.