Preheat the oven to 400°F.
Season the chicken breast strips with salt, pepper and 2 teaspoons of cayenne. Sprinkle with flour and toss to coat on all sides. In an 8x8” baking dish, combine the Greek yogurt, 2 teaspoons cayenne, 1 teaspoon chipotle powder. Whisk to combine. To a second 8x8” baking dish, add the breadcrumbs, remaining cayenne and chipotle, the mustard powder and garlic powder.