No buttermilk? No problem! These biscuits bake up tender, fluffy, and golden brown thanks to plain yogurt, which keeps them wonderfully thick and moist as well. They’re primarily leavened with baking powder, with just enough baking soda to add a little omph to their browning and rise. This ensures the yogurt’s tangy flavor shines through, a perfect counterpoint to the biscuits’ buttery richness.