To make the biscuit batter, cut the cold butter into small cubes. Add the flour, 1/4 cup of sugar (reserve the other 1/4 half for brushing the tops of the biscuits), butter, baking powder and salt into a food processor and pulse until the butter is pea-sized. Stream in the cream and pulse until the batter is just combined. Alternatively, instead of using a food processor, you can use a pastry cutter to cut the butter into the dough or use your fingers to crush the butter into the flour. You can also grate the cold butter into the flour using the largest grate holes. If using your hands just work quickly since you don’t want the butter to get too warm. It should remain in cold chunks.