Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper or lightly grease it with cooking spray to prevent sticking.
Cut the cauliflower into small, bite-sized florets. Make sure they’re roughly the same size for even cooking.
In a large bowl, whisk together the flour, garlic powder, onion powder, paprika, salt, and pepper. Gradually add the milk, whisking continuously until the mixture is smooth and lump-free.
Dip each floret into the batter, ensuring it’s completely coated. Let any excess batter drip off before moving to the next step.
In another bowl, mix the panko breadcrumbs and grated Parmesan cheese (if using). Roll the battered cauliflower in the mixture, pressing gently so the crumbs adhere well.
Arrange the coated florets on your prepared baking sheet in a single layer. Lightly spray the tops with olive oil spray to encourage browning.
Bake for 25–30 minutes, flipping halfway through. They’re ready when crisp and golden.
In a small bowl, mix Greek yogurt, sriracha, honey, lime juice, salt, and pepper. Taste and adjust the seasoning. Chill until ready to serve.
Serve the crispy cauliflower bites fresh from the oven with the dipping sauce on the side.