Creating Pretzel Chicken with Mustard-Cheddar Sauce is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
2. Prepare Chicken: Pat the chicken breasts dry with paper towels. Season with salt, pepper, garlic powder, and onion powder.
3. Set Up Breading Station: In three separate shallow bowls, place flour, beaten eggs mixed with milk, and pretzel crumbs.
4. Coat Chicken: Dredge each chicken breast in flour, shaking off excess. Then dip in the egg mixture, and finally, coat thoroughly with pretzel crumbs.
5. Bake: Place the coated chicken breasts on the prepared baking sheet. Bake in the preheated oven for 20-25 minutes or until golden brown and cooked through (165°F internal temperature).
6. Make the Sauce: While the chicken is baking, combine Dijon mustard, shredded cheddar cheese, and sour cream in a small saucepan over low heat. Stir until the cheese melts and the sauce is smooth.
7. Serve: Once the chicken is cooked, remove it from the oven and let it rest for 5 minutes before serving.
8. Garnish: Drizzle the mustard-cheddar sauce over the chicken and sprinkle with chopped parsley.

Following these steps will ensure you create this delectable dish with ease!