1/2 - 1cupoptional fun things like aged cheddar, bacon, sliced jalapenos, pitted olives, cranberries, etc.
1cupbuttermilksee #2 below
Instructions
Preheat oven to 450F
Whisk dry ingredients together.
Cut in cold butter - see #3 below,
Add optional fun ingredients - make sure they're not dripping wet.
Stir in buttermilk until barely combined. We do not want to make bread dough.
Measure 1/4 cup balls, place in a greased cast-iron pan, or baking sheet.
Bake approx 20 minutes, until golden brown.
Notes
I like salty biscuits, but if you don't, and you're using salted butter, start with 1/2 tsp salt, and remember for next time.
1 cup buttermilk = 1 cup - 2 tsp milk + 2 tsp vinegar, stir and let sit 5 minutes. Sounds gross, deal with it. Depending on your flour, you might need less than 1 cup, so start with 3/4 cup and see if you need more liquid.
Cutting butter = using a pastry cutter, knives, or fork, incorporate the chilled butter into the flour, until the mixture is crumbly.