In a large mixing bowl, whisk together the dry ingredients until everything is combined.
2 ½ cups All purpose flour, 2 ½ tablespoon Baking powder, 1 teaspoon Sea salt, 1 teaspoon Garlic powder, 1 teaspoon Sugar
Add the grated cheese and butter to the dry ingredients, and toss it into the flour using your fingers or a rubber spatula so the cheese and butter is coated with flour. Be gentle, as you want the butter to stay intact.
1 stick Salted butter, 1 cup Cheddar cheese
Pour in the half and half cream, and stir together with a wooden spoon or rubber spatula. Stir the dough together until rough clumps have formed.
1 cup Half and half cream
Empty the bowl onto a clean surface, and bring it together with your hands. Be sure not to overwork the dough, as you want the butter to stay cold.
Next, you will want to fold the dough over itself three times. You will take the dough from one side, and fold it into the middle. Take the dough from the other side, and bring that over to the middle, on top of the folded piece. Rotate the dough, flatten, and repeat three times.
Using a glass, or a cookie cutter that fits the size of biscuits you want, cut out your biscuits. Reform the scraps, and cut out the remaining biscuits.
Arrange the biscuits in your air fryer basket. Using a pastry brush, brush the tops of the biscuits with a thin layer of half and half cream.
Air fry the biscuits for 12-15 minutes at 375°F. Check the biscuits at the 10 minute mark for doneness.
Brush the tops of the biscuits with butter, and serve.