Preheat the oven to 400℉
In a large bowl, mix together the dry ingredients: flour, baking powder, sugar, and salt.
Chop the cold butter into cubes (I like to freeze the butter for a couple of minutes before adding it) and cut it into the dry ingredients with two forks or a pastry blender, until a course texture is achieved.
Add in kefir and stir until just mixed and the dough comes together.
Place the dough on a lightly floured surface. Roll the dough out to 3/4 inch thickness and fold in thirds.
Flatten dough to about 3/4 inch thick with a rolling pin and cut biscuits out with your biscuit cutter or glass jar.
Place on a baking sheet and bake for 15-20 minutes until they start to turn golden around the edges.