Preheat oven to 400 degrees. Line a large baking sheet with parchment paper and set aside.
In a large bowl combine flour, baking powder, sugar, salt, and pepper. Use a cheese grater to shred the butter and then combine with the dry mixture. USe your fingertips to rub the butter into the mix until it resembles course meal.
Stir in the fresh thyme leaves then add cheese and all heavy cream except one tablespoon. Mix with a fork until a sticky ball forms.
Turn the dough out onto a generously floured surface and knead with floured hands until the dough has been worked into a ball (about 4 or 5 times). Pat the dough out into a 1 " thick round and use a biscuit cutter to cut out as many rounds as possible, re-rolling the scraps.
Place the biscuits on the prepared baking sheet and brush each one with the remaining heavy cream. Bake for 18-20 minutes or until golden brown. Serve hot with butter and/or jam.