Preheat oven:
Preheat to 425°F (220°C). Line a baking sheet with parchment paper.
Mix dry ingredients:
In a large bowl, whisk together flour, baking powder, baking soda, salt, and sugar.
Cut in butter:
Add cold butter cubes and mix with a pastry cutter or fork until the texture resembles coarse crumbs.
Add cheese and buttermilk:
Stir in cheddar cheese. Pour in buttermilk and gently mix until dough just comes together. Do not overmix — it keeps the biscuits light and fluffy.
Shape or drop:
For easy drop biscuits, use a spoon or scoop to drop portions of dough onto the baking sheet. For traditional homemade biscuits, lightly flour a surface, pat the dough to 1-inch thickness, and cut with a biscuit cutter.
Bake:
Bake for 12–15 minutes, or until tops are golden brown.
Brush with garlic butter (optional):
Mix melted butter with garlic powder and parsley, then brush over warm biscuits before serving.