Preheat oven to 375°F (190°C). Line a baking sheet with a silicone liner or parchment paper.
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and garlic powder.
Add the butter and mix with a pastry blender or a fork until the butter is the size of peas. Stir in the cheeses.
Add the buttermilk and mix just until combined.
Using 3 tablespoons of dough at a time, drop the dough onto the prepared pan, leaving about 1 & 1/2 inches between biscuits.
Bake 25 to 30 minutes, or until golden brown.
Notes
Store in an airtight container at room temperature up to 2 days.
For tips, step-by-step photos, and extra details, be sure to read the full post above before starting. It’s packed with helpful info to answer common questions!