Preheat your oven to 425°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized cubes and ensure the cauliflower is broken into small, uniform florets.
In a large mixing bowl, toss the chicken and cauliflower with olive oil, arrowroot powder, sea salt, and black pepper until every piece is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring there is space between pieces for even browning.
Roast for 20 minutes, flipping halfway through, until the chicken is cooked through and the cauliflower edges are golden and crisp.
While the bites roast, whisk together the Greek yogurt, lemon juice, garlic powder, onion powder, and dried dill in a small bowl to create the ranch dip.
Transfer the roasted chicken and cauliflower to a clean bowl, add the buffalo sauce, and toss gently to glaze.
Serve the buffalo bites immediately with the creamy ranch dip on the side.