Refrigerate butter for 30 minutes or freeze for 15 minutes, until cold. Preheat oven to 425 degrees F. Prepare a parchment lined baking sheet.
Whisk together flour, sugar, baking powder, salt, and baking soda. Cut in chilled butter with a fork or your fingers until mixture resembles coarse sand.
Fold in cheese and seeds. Stir in buttermilk until combined. Turn dough onto a lightly floured surface and knead gently to form a smooth ball. Roll out to 3/4 inch thickness.
Cut biscuits using a 2 1/2 inch cutter dipped in flour. Arrange biscuits upside down on prepared baking sheet. Gather remaining dough and roll out again.
Bake for about 5 minutes until biscuits begin to rise. Rotate pan and reduce oven temperature to 400 degrees. Bake for 10-12 minutes until golden brown. Transfer to wire rack and let cool slightly. Serve warm