Preheat air fryer on the hottest setting for a full 10 minutes. Grate the 4 ounces of sharp cheddar cheese and set aside.
Add flour to large mixing bowl. Slice the cold butter and add to the flour. Add the ground sausage and mix together with a pastry cutter or your hands. The idea is to break up the sausage and butter and have it combine with the flour without melting the butter. Kind of what you would do if you were making biscuits or a pie crust.
Add in the salt, black pepper, sour cream and half and half and mix together until you don't see any dry flour. Mix in the cheese and the ingredients will hold together like a ball of dough.
Form the sausage balls with a large scoop that is about 3 Tablespoons and roll them between the palms of your hands until a ball is formed. Repeat for the remaining sausage mixture. *I usually place a sheet of parchment on a cooling rack and place the uncooked sausage balls there until I'm ready to air fry them.
Once the sausage balls are formed and the air fryer has preheated for a full 10 minutes. Spritz the air fryer basket with oil and place the sausage balls in a single layer in the basket. Air Fry on 350℉/175℃ for 10 minutes, flipping them halfway through.
When the 10 minutes is up and the sausage balls have reached an internal temperature of at least 190℉/88℃, they are done. Remove from the air fryer and allow to cool on a cooling rack until you are ready to serve them.
Honey Mustard Dipping Sauce
Combine all ingredients in a medium size bowl and whisk until smooth.