Place butter in a dish in the freezer 15 minutes before starting.
Preheat oven to 425 degrees and line a baking sheet with parchment paper.
Add flour, baking powder, sugar and salt to a bowl and stir to combine.
Add butter to the bowl and using a fork (or pastry cutter), cut the butter into the dry ingredients.
Pour the milk into the bowl and gently combine - do not over mix.
Transfer dough to a flour dusted surface and mold into a ball.
Gently press the dough out with your hands and fold in half. Turn and fold it in half again. On the 3rd fold, sprinkle some fresh thyme onto the dough. Fold an additional 2 times.
Flatten dough out until it is about an inch thick. Using a biscuit cutter, cut out as many biscuits as possible. Place the finished biscuits on the baking sheet. Re-flatten the dough and cut additional biscuits. You should be able to make 6.
Place biscuits in the oven for 10-12 minutes.
While the biscuits are cooking, prepare the gravy according to the instructions (or reheat leftover gravy).
Remove the biscuits from the oven, break them in half, plate them and top with gravy & additional fresh thyme. Serve immediately.