I have to make these and immediately hide them. The kids pop them like candy if they're on the counter.
2 c flour
2 t sugar
2 t baking powder
1 t kosher salt
3/4 t baking soda
1/2 c butter, frozen
1 c active sourdough starter
1/2 cup buttermilk (or 1/2 c milk with a splash of lemon juice)
Preheat to 450. Line a baking sheet with parchment paper.
In a large bowl, combine dry ingredients. Grate butter into flour mixture.
Whisk together sourdough and buttermilk. Add the flour mixture and stir until soft dough forms.
Working on a lightly floured surface, knead the dough 2-3 times until it comes together. Using a rolling pin, roll the dough into a 1 1/2-inch-thick rectangle. Cut out 8-10 rounds using a 2-inch biscuit or cookie cutter.
Place biscuits onto the prepared sheet. Bake for 14-18 minutes, or until golden brown. Watch closely. If you didn't roll out the dough thick enough it's more likely to burn.
I usually double this recipe successfully.