*It's very important that you use chilled butter for this, that will make sure the biscuits are flaky. You can refrigerate or freeze the butter, don't use room temperature or melted butter.*
Preheat oven to 400 degrees.
In a bowl mix flour, baking powder, baking soda, salt and sugar.
Slowly start to cut butter in the flour mixture. You can either grate the butter or I use a knife to cut into small pieces. Keep cutting butter in until it's all gone. You want the mixture to look like crumbs.
Mix in buttermilk.
Knead dough in bowl for 30 seconds.
Transfer to a greased baking sheet and roll out with your hands into a 7x7 piece. With a knife, cut 12 sections but don't don't cut all the way or separate them. This will make them easy to rip apart when done.
Bake 15 minutes.
When out of the oven, cut into sections and serve hot.