Grilled Shrimp Recipe in Oven: Cast Iron Char Without the Grill

Achieving perfect grilled shrimp without a grill is absolutely possible with this oven method. Cast iron creates those coveted char marks while keeping the shrimp juicy and flavorful. I developed this technique during a Portland winter when outdoor grilling wasn’t an option.

The secret lies in preheating your cast iron skillet in a 450°F oven. This high heat mimics the sear of a grill, while a simple garlic butter marinade infuses every bite with rich, aromatic flavor. The shrimp cook in just 5-7 minutes, making this a quick weeknight solution.

What emerges is shrimp with smoky, charred edges and tender centers. The garlic butter creates a sauce that’s perfect for mopping up with crusty bread. This method delivers restaurant-quality results with minimal effort.

Serve as an appetizer with lemon wedges or as a main course over rice. Here’s how to make it happen.

Ingredients for Grilled Shrimp Recipe in Oven

Simple ingredients, maximum flavor. Cast iron and shrimp are all you really need here.

The shrimp are the star, so freshness matters. Look for large or jumbo shrimp (16-20 count per pound) at your seafood counter—wild-caught if available. I grab mine from Whole Foods or a trusted local fishmonger. The butter should be high-quality (I use Plugrá), and don’t skip the fresh garlic—it makes the marinade sing. Preheating the cast iron is key to getting those char marks.

No fresh lemon? Bottled works in a pinch, but fresh has more zing. Short on parsley? Cilantro or chives add a nice touch. If you’re avoiding dairy, swap the butter for olive oil—still delicious. The smoked paprika is optional but adds that grilled flavor. For extra kick, a pinch of cayenne never hurts.

The shrimp are best served immediately, but leftovers keep for 1-2 days in the fridge. Reheat gently to avoid overcooking. The garlic butter sauce can be stored in an airtight container for up to 3 days.

Step-by-Step Instructions for Grilled Shrimp in Oven

This foolproof method delivers smoky, charred shrimp right from your oven with minimal effort.

Step 1: Season and Marinate the Shrimp

Pat the 1.5 lb Large Shrimp dry with paper towels—this ensures a good sear. In a large bowl, melt the 0.5 cup Unsalted Butter and whisk in the 2 tbsp Fresh Lemon Juice, 4 cloves Garlic Cloves (minced), 1 tsp Salt, 0.5 tsp Black Pepper, and 0.5 tsp Smoked Paprika.

Add the shrimp to the marinade and toss to coat evenly. Let it sit for 10-15 minutes while you preheat the oven. The shrimp will absorb all those bold flavors, and the smoked paprika adds that classic grilled depth.

Step 2: Prep the Cast Iron Skillet

Place a large cast iron skillet in the oven and preheat to 450°F. This high heat is crucial for getting that coveted char. Once hot, carefully remove the skillet and add the 1 tbsp Olive Oil, swirling to coat the bottom evenly.

Here’s the thing—cast iron retains heat incredibly well, so it mimics the direct flame of a grill. This step ensures your shrimp will sizzle on contact, just like they would on an outdoor grill.

Step 3: Sear the Shrimp to Perfection

Working quickly, arrange the shrimp in a single layer in the hot skillet. Don’t overcrowd the pan—you want each piece to have direct contact with the hot surface. Return the skillet to the oven and cook for 4-5 minutes until the shrimp turn opaque and develop light char marks.

Flip the shrimp and cook for another 3-4 minutes until they’re fully opaque and the edges look slightly crispy. The butter and garlic in the marinade will create a fragrant, golden sauce in the pan—perfect for soaking up with Crusty Bread later.

Step 4: Garnish and Serve Immediately

Remove the skillet from the oven and transfer the shrimp to a serving platter. Spoon any pan juices over the top for extra flavor. Sprinkle with the 0.25 cup Fresh Parsley (chopped) and serve with 4 pieces Lemon Wedges on the side.

These shrimp are best enjoyed right away, while they’re still hot and the char is at its peak. The smoky, garlicky aroma will have everyone at the table before you even finish plating. Don’t forget the Crusty Bread to soak up every last bit of that incredible sauce!

Flavor Customization for This grilled shrimp recipe in oven

Spicy Kick

Add ½ tsp cayenne pepper or 1 chopped chipotle in adobo to the marinade for serious heat. I love how the smokiness of chipotle pairs with the garlic butter. Serve with extra lime wedges to balance the spice. 🌶️

Herb Variations

Swap parsley for fresh cilantro or dill to change the flavor profile completely. 1 tbsp fresh rosemary adds a piney note that works beautifully with shrimp. These herbs grow abundantly in my Portland garden.

Citrus Twist

Replace lemon juice with lime or orange juice for a different citrus brightness. Add 1 tsp zest for extra punch. The orange version reminds me of summer days in Cincinnati.

Cheesy Addition

Sprinkle ¼ cup grated Parmesan over the shrimp during the last 2 minutes of cooking. It melts into the garlic butter sauce, creating a rich, savory topping. I discovered this trick at a little Italian spot in Portland.

Smoky Depth

Double the smoked paprika or add ¼ tsp liquid smoke to intensify the grilled flavor. A pinch of ground cumin also adds warmth. These small tweaks make a big difference. 🔥

Sweet Glaze

Brush the shrimp with 1 tbsp honey mixed with 1 tsp soy sauce during the last 3 minutes for a sweet-savory glaze. The honey caramelizes beautifully, adding a glossy finish to the charred edges.

Frequently Asked Questions