The night before, mix the flour and oil together until crumbly.
Add starter and milk and mix until combined.
Cover and allow to rise overnight for 8-12 hours.
Preheat oven to 400 degrees F.
The next morning, add the salt, baking soda, and baking powder.
Work into dough by kneading for a few minutes until well combined and smooth.
Chop up jalapenos and shred your cheese.
Roll dough out to 1/4-1/2 inch thickness.
Using a mason jar top or biscuit cutter, cut out biscuits and place on greased baking sheet or cast iron skillet.
Bake for 20 minutes.
Optionally, you can brush tops with butter while still hot!