Preheat your oven to 400°F (200°C).
Line a baking sheet with parchment paper.
In a small bowl, mix together garlic powder, paprika, salt, and black pepper.
Season the chicken breasts evenly with the spice mixture.
Place the seasoned chicken breasts on the prepared baking sheet.
Bake in the preheated oven for 20-25 minutes, or until the chicken's internal temperature reaches 165°F (74°C).
While the chicken is baking, melt the butter in a saucepan over medium heat.
Add the hot sauce to the melted butter, stir to combine, and simmer for 2-3 minutes. Set aside.
In a separate bowl, combine blue cheese crumbles, sour cream, mayonnaise, white vinegar, Worcestershire sauce, and ground mustard. Mix until smooth to make the blue cheese dip.
Once the chicken is cooked, remove it from the oven and let it rest for 5 minutes.
Brush the buffalo sauce over the chicken breasts, ensuring they are well coated.
Serve the Keto Buffalo Chicken Breast hot with the Blue Cheese Dip and celery sticks on the side.