Whisk flour, baking powder, baking soda, sugar, and salt in a large mixing bowl.
Quickly grate frozen butter into the bowl of flour (grated butter ensures the fat is evenly distributed throughout the dough for light and fluffy biscuits). Or quickly cut butter into flour mixture with a pastry blender until the mixture resembles coarse crumbs; this might take about 5 minutes.
Make a well in the center of the flour mixture, add buttermilk, and stir until it forms a rough ball. Please don't over-mix. Let it rest in the fridge for about 10 minutes.
Preheat the oven to 400℉ (205℃).
Turn the dough out onto a floured board or surface. Gently knead 3-4 times, just enough for it to come together.
Gently pat the dough flat to about ½″ thick.
Then fold the dough, repeating the folding process 6-8 times to ensure flakiness. After folding, gently press the dough down to an inch thick, ready to be cut.
Use a 2-inch round cookie cutter or a glass to cut out the biscuits and space them out equally on your prepared baking sheet. Brush with cream.
Bake at 400℉ (205℃) for 12-15 minutes or until lightly browned.