In a small bowl, combine mayo, butter, oil, herbs and garlic.
In a separate small bowl, combine salt, pepper, chili powder and paprika.
Cut the potatoes into even sizes so they cook thoroughly, about 1" in thickness. Rinse potatoes and pat dry.
Add the chicken, mushrooms, potatoes and carrots to a baking casserole dish.
Pour the mayo mixture over the ingredients, mix and coat evenly. Season with half of the seasoning prepared. Mix. Season with remaining seasoning and toss again.
Bake in a preheated oven to 400°F, uncovered (50-60 minutes, longer if necessary). If the chicken drumsticks are ready but don’t have a crispy coat, broil for 5 minutes.
Take the juices from the bottom of the dish and pour over all of the ingredients. Enjoy!