Baked Spicy Spinach Dip



1 cup sour cream
1½ cup Parmesan cheese, shredded and divided
8 oz. whipped cream cheese
1 - 10 oz. package of frozen spinach, thawed and drained
1 cherry pepper, finely diced
1 tsp ground cayenne pepper
¼ tsp paprika
2 cloves garlic, minced
¼ tsp salt
1 tsp onion powder
dash of black pepper