Seafood boil butter sauce

1 pound butter 1 med onion dices 8 to 10 cloves of garlic ( i used 3 Tbsps minsed) 1/4 cup cajun seasoning 2 to 3 tbsp old bay 1 tbsp onion powder 2 tbsp dark brown sugar 1 Tbsp red pepper flakes 1 1/2 cups chicken stock juice of one lemon fresh parsley and cilantro mix 1 tsp blk pepper 1/2 tsp oregano