First, put the flour, baking powder and salt in a mixing bowl.
Cut in the butter until it is the size of small peas. Then add the yogurt, along with enough milk to make a stiff dough. Turn the dough out on a floured work surface.
Knead a few strokes, just until you can smooth it into a ball. If you knead it too much, the biscuits will be tough.
Roll out the dough until it is about half an inch thick.
Cut it into biscuits. The cutter I use is about 2.5 inches in diameter. For just the two of us, I only make half the recipe and get 6 biscuits. I get 4 biscuits from the first cutting, gather the scraps together, roll them out and get 2 more.
Put the biscuits on a cookie sheet in a 400 degree oven and bake until golden brown.
There is nothing better on a cold winter morning than hot biscuits with lots of butter and jelly! Yum!