Slow-Roasted Mississippi Gulf Coast Oysters with Garlic-Parsley Butter

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

About the author — is the Test Kitchen Director at AislePrompt, with over a decade of professional kitchen experience spanning recipe development, culinary technique testing, and hands-on evaluation of cooking methods across hundreds of tested dishes. She sets the technique templates and dietary-tag rules this AI-assisted recipe is built from and directs the Test Kitchen's sampled cook-through checks — see how AislePrompt recipes are developed and reviewed. Full author profile →

Fresh Gulf oysters slow-roasted with a luscious garlic and parsley butter that enhances their natural briny sweetness. This American-inspired seafood recipe, ready in about 35 minutes, pairs Fresh Gulf oysters in shell, Unsalted butter, Minced garlic for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 150 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 20 min Serves 6 American cuisine 150 cal/serving
Build a week of meals around this recipe → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

The sheet pan we’d roast this on → Best Sheet Pans in 2026: Top Picks + Buying Guide

Affiliate disclosure: AislePrompt may earn a commission on qualifying purchases made through Amazon links, at no additional cost to you. See our policy →

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Bakeware & baking tools → Shop all kitchen tools →

Instructions

  1. Step 1: Preheat the oven to 275°F. In a small saucepan, melt 6 tbsp unsalted butter over low heat. Add 4 cloves minced garlic, 3 tbsp chopped fresh parsley, 1 tsp lemon zest, 1/2 tsp salt, and 1/4 tsp black pepper. Simmer gently for 3 minutes until fragrant, then remove from heat.
  2. Step 2: Shuck 24 fresh Gulf oysters, leaving them on the half shell placed on a baking sheet lined with rock salt to stabilize. Spoon about 1 tsp of the garlic-parsley butter over each oyster.
  3. Step 3: Roast the oysters in the preheated oven for 15-18 minutes until the edges of the oysters curl slightly and the butter is bubbling. Serve immediately with fresh lemon wedges.

Frequently asked questions

How long does Slow-Roasted Mississippi Gulf Coast Oysters with Garlic-Parsley Butter take to make?

Total time is about 35 minutes (15 min prep + 20 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Slow-Roasted Mississippi Gulf Coast Oysters with Garlic-Parsley Butter?

Refrigerate in a covered airtight container for up to 3–4 days (FDA FoodKeeper guideline for cooked fish). Store any fresh salsa or citrus-based garnish in a separate container — it keeps for up to 2 days. Freeze cooked fish (without fresh garnishes) for up to 3 months; thaw overnight in the fridge and reheat gently at 275°F until just warmed through to preserve texture.

Can I substitute ingredients in Slow-Roasted Mississippi Gulf Coast Oysters with Garlic-Parsley Butter?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Slow-Roasted Mississippi Gulf Coast Oysters with Garlic-Parsley Butter for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Slow-Roasted Mississippi Gulf Coast Oysters with Garlic-Parsley Butter?

American seafood like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

Related recipes