Preheat the air fryer: Set it to 390°F (200°C) for about 5 minutes. Lightly spray the basket with oil so the batter doesn’t stick.
Prep the cauliflower: Cut into even, bite-size florets.
Rinse and pat dry very well. Excess moisture will soften the coating.
Make the batter: In a large bowl, whisk flour, cornstarch, garlic powder, onion powder, smoked paprika, salt, and pepper. Add milk and 1 tablespoon oil.
Whisk until smooth and thick enough to coat. If too thick, add a splash more milk.
Coat the florets: Toss cauliflower in the batter until every piece is covered. Let excess drip off so the coating stays light.
Air fry, first pass: Arrange florets in a single layer in the basket, leaving space between pieces.
Cook for 9–11 minutes, shaking halfway, until lightly golden and set. Work in batches if needed.
Make the buffalo sauce: Stir together buffalo sauce, melted butter, and honey (if using). Taste and adjust heat or sweetness.
Sauce and crisp, second pass: Transfer cooked florets to a bowl and toss with the buffalo sauce.
Return to the air fryer for 3–5 more minutes to set the sauce and crisp the edges.
Make the blue cheese dip: In a bowl, combine blue cheese, sour cream, mayo, lemon juice, and garlic (if using). Stir in milk or buttermilk to reach a creamy, dippable texture. Season with salt and pepper.
Garnish with chopped chives or parsley.
Serve: Plate the hot cauliflower with the blue cheese dip on the side. Add celery sticks and carrot sticks for freshness and crunch.