Preheat oven to 400°F.
Lightly brush a baking dish with 1 tablespoon melted butter.
Pat haddock fillets thoroughly dry with paper towels.
Arrange fillets in the prepared dish with space between them.
Season fish evenly with salt and black pepper.
Drizzle lemon juice over the fillets.
Pour white wine around the fish, taking care not to pour it directly over the tops.
Place Ritz crackers in a zip-top bag.
Crush crackers into coarse crumbs using a rolling pin or the bottom of a measuring cup.
Add cracker crumbs, parsley, lemon zest, garlic powder and paprika to a medium bowl.
Pour the remaining 4 tablespoons melted butter over the crumbs.
Toss gently until the crumbs are evenly moistened but still loose.
Divide topping evenly among the fillets.
Press crumbs very lightly onto the fish without compacting them.
Bake for 12 to 16 minutes, depending on the thickness of the fillets, until the fish is opaque and separates easily with a fork.
Broil for 30 to 60 seconds if additional browning is desired, watching closely to prevent burning.
Remove from oven.
Let stand for 2 minutes.
Garnish with chopped parsley.
Serve immediately with lemon wedges.