Preheat the oven to 425°F (220°C). Grease a 9x9 baking pan; set aside.
Combine the flour, sugar, salt, and baking powder in a large bowl.
2 cups all purpose flour, 1 tablespoon sugar, 1 tablespoon baking powder, 1 teaspoon salt
Shred the cold butter into the dry ingredients using a cheese grater.
6 tablespoons unsalted butter
Mix the butter and flour mixture thoroughly, then use a pastry cutter to work the butter into the dough until it is in small, pebble-sized pieces.
Fold the heavy cream, shredded cheese, and jalapeños into the flour mixture until a soft dough forms.
3 ounces cheddar cheese, 2 jalapenos, ¾ cup heavy whipping cream
Lightly flour a work surface and use your hands to shape the dough into a rectangle.
Use a rolling pin to gently flatten the dough, then fold it in half. Turn the dough and fold again twice more. (This process helps create flaky layers in the biscuits.)
Roll the dough out to 1-inch thick.
Dip your biscuit cutter into flour, and then cut out the biscuits. Gather leftover dough and repeat the cutting process.
Place the dough into the prepared baking pan. (Optional: brush with melted butter).
2 tablespoons butter
Bake for 12-15 minutes until the tops are golden brown and the biscuits are cooked throughout.