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

1. Preheat the Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Prepare the Coating: In a shallow dish, place the crushed pretzels. In another dish, mix the flour, garlic powder, onion powder, smoked paprika, salt, and pepper. In a third dish, whisk together the eggs and milk.
3. Coat the Chicken: Dip each chicken breast first in the flour mixture, then in the egg mixture, and finally in the crushed pretzels. Ensure each piece is evenly coated.
4. Arrange on Baking Sheet: Place the coated chicken breasts on the prepared baking sheet, spacing them apart.
5. Bake the Chicken: Bake in the preheated oven for 30-35 minutes, or until the chicken is cooked through and the coating is golden brown.
6. Make the Sauce: While the chicken is baking, prepare the mustard-cheddar sauce. In a small saucepan, combine the Dijon mustard and sour cream over low heat. Stir until smooth and heated through. Add the shredded cheddar cheese and continue stirring until melted.
7. Rest the Chicken: Once the chicken is cooked, remove it from the oven and allow it to rest for about 10 minutes.
8. Serve: Slice the chicken breasts and drizzle the mustard-cheddar sauce over the top.

These steps will guide you in creating this incredible dish effortlessly.