In a mixing bowl, whisk together the flour, baking powder, baking soda, sugar (if using), salt, garlic powder, onion powder, and dill.
2¼ (280g) cups all-purpose flour, 2 tsp baking powder, 1 tsp baking soda, 2 tsp sugar, ½ tsp fine sea salt, 1 tsp garlic powder, ½ tsp onion powder, ½ tsp dried dill
Make sure the butter is very cold before grating it, I like to pop the butter into the freezer for 5 minutes prior to grating. Using a box grater or the grating attachment on your food processor, grate the cold butter into small bits. Grate your cheese as well if needed.
½ (113g) cup cold salted butter
Add the cold butter and the shredded cheese to the dry ingredients, and mix it all together until the butter bits and the cheese are well coated in the dry ingredients.
1¼ (150g) cups shredded sharp cheddar
Create a little well in the center of the dry ingredients, and add the cold sourdough discard and the cold buttermilk.
½ (120g) cup sourdough discard, ½ (120g) cup cold buttermilk, 2 tsp honey
Using a pastry blender or your hands, gently bring the wet and dry ingredients together until the dough starts to roughly come together and a shaggy dough forms. It's important not to overmix the dough at this stage, or the biscuits will be tough.