Preheat oven to 475°F. Line a rimmed baking sheet with parchment paper and set aside.
In a large mixing bowl, add 2 cups (226 g) self-rising flour.
Slowly pour in 1 1/2 cups (357 g) heavy whipping cream while stirring gently with a spatula or spoon until the dough is just combined — do not overmix.
Fold in 1/2 cup (56.5 g) grated cheddar cheese and the 2 scallions (30 g), finely chopped, until evenly distributed.
Turn the dough out onto a lightly floured countertop or dough board. Use floured hands to handle the dough; do not compress it excessively.
Gently pat or roll the dough to about 1/2-inch (1.3 cm) thickness.
Cut biscuits using a ~2-inch biscuit cutter. Gather any scraps, gently press together (do not overwork), and cut additional biscuits until dough is used.
Place the cut biscuits on the prepared baking sheet, leaving about 1 inch between each biscuit.
Bake in the preheated oven for 10–12 minutes, until the biscuits are golden on top.
Remove from the oven and serve warm.