Air Fryer Homemade Buttermilk Biscuits

In a food processor combine flour, baking powder, soda, sugar and salt. Pulse to combine. Or whisk them together in a large bowl. Add butter cubes and process until it is incorporated and you still have pea-size chunks. Or use a pastry cutter to incorporate the butter.
Add buttermilk and mix until it just starts to come together. Place on a floured surface and form it into a rectangle.
Cut the rectangle into 3 sections and stack them on top of each other. Roll it out and repeat 3 times. Then roll to a 1-inch thickness.
Use a 2-inch biscuit cutter and cut straight down, don’t twist. Place biscuits on parchment paper and freeze for 10 minutes.
Preheat the air fryer to 400º.
Brush the top of the biscuits with butter and place them on the rack or in the basket of an air fryer. If using a basket you should be able to fit 6 biscuits at a time. If using racks you can put ut to 6 biscuits on each rack and bake them all at once.
Bake for 10 minutes. Remove and immediately brush with more melted butter and sprinkle with flaky salt.