Preheat the oven to 375 degrees.
Whisk together the flour, sugar, baking soda, baking powder, and salt in a large bowl.
Cut the cold butter into 1/4 inch cubes and add it to the flour mixture.
Using a pastry cutter or your hands work the butter into the flour until it resembles course pea-size pieces.
Add raisins or currant to the flour/butter mixture.
Make a well in the mixture and pour the buttermilk into the flour/butter mixture.
Stir it with a fork until a soft dough forms. Do not overmix.
Turn the dough onto a floured worksurface and gently kneed into a ball.
Form the ball into a 6-7 inch circle.
Cut an X on the top of the dough about 1 inch deep.
Bake on a baking sheet or in a cast iron skillet about 35-40 minutes until golden brown.
Cool a bit on a wire rack before serving with butter, honey or jam.