The first thing that escapes when you open one of these foil packets is a rush of lemony steam, followed by garlic and Old Bay. I like this format for shrimp boil because the potatoes, corn, sausage, and shrimp get their own serving, and every packet gets a share of the seasoned butter. These Shrimp Boil Foil Packets bring the familiar pieces of a shrimp boil together without a pot full of ingredients to drain and serve.
I mix the melted butter with the garlic, Old Bay, black pepper, and lemon juice before adding anything else. That gives me an even coating on the vegetables, shrimp, and sausage before they go into the foil. The lemon wedges sit on top, where their juice can mingle with the buttery seasoning as everything bakes. Each packet opens to tender potatoes, sweet corn, smoky sausage, and shrimp with a bright, savory coating.
Kitchen Note
Give the packets their full 2-minute rest before you open them. The steam is intense right out of the oven, so lift the foil away from your face and hands as you unfold it.
Save these Shrimp Boil Foil Packets for a hands-off dinner with buttery potatoes, sweet corn, and tender shrimp in every portion.
Why the Potatoes Need a Head Start Before the Shrimp
Potatoes are the slowest part of this packet, while shrimp cook quickly. Putting raw potatoes in the foil with the seafood would leave you choosing between firm potatoes and shrimp that have spent too long in the oven. Boiling the potatoes first gets their centers cooking before the shrimp joins them.
The corn goes into the pot later, with its own short boil, so it gets warmed through without losing its bite. Then the drained vegetables finish in the oven alongside the raw shrimp and sausage. That staggered start lets the ingredients reach the table together rather than asking the shrimp to wait for the potatoes. Cutting the potatoes into pieces close to 1 inch keeps the timing dependable; a mix of very small and very large chunks won’t cook as evenly.
What the Butter, Old Bay, and Shrimp Each Bring to the Packet
- Baby potatoes — Their small size makes them easy to cut into even pieces, and their skins stay intact through boiling and baking. Red potatoes are a practical swap; cut them into the same 1-inch pieces so they cook on the same schedule.
- Corn — Fresh ears cut into short sections give the packets substantial, juicy bites. Keep the pieces around 2 inches so they’re easy to portion and eat. Loose frozen kernels won’t have the same texture or cook in quite the same way.
- Large raw shrimp — The 16/20 count size is substantial enough to stay distinct among the vegetables and sausage. Use peeled, deveined shrimp that have thawed before assembly; smaller shrimp are more likely to overcook during the packet bake.
- Smoked andouille sausage — Andouille brings smoky heat and richness to the butter. For a milder, less peppery result, smoked kielbasa works well; slice it to the same thickness so it warms through with the other ingredients.
- Unsalted butter, garlic, and Old Bay — Unsalted butter lets the seasoning stay balanced, while minced garlic and Old Bay give the coating its savory, familiar boil flavor. If Old Bay isn’t on hand, Cajun seasoning can stand in at the same amount, though the heat and saltiness vary by blend.
- Lemon — Fresh juice brightens the butter, and the wedges add a more fragrant citrus note inside the packet. Bottled juice can replace the squeezed juice in a pinch, but keep fresh wedges for the bake if you want that same aromatic finish.
Build the Packets in the Right Order for Tender Shrimp
Start the Potatoes in Salted Water
Heat the oven to 425°F while you bring 16 cups of water and the kosher salt to a boil in a 6-quart pot. Add the potatoes, cut into 1-inch pieces, and boil them for 8-10 minutes. Keep the water at a steady boil rather than letting it fall to a simmer when the potatoes go in. This first cook gives the potatoes the time they need before they share the oven with quick-cooking shrimp.
Add the Corn, Then Drain Well
Add the corn pieces to the pot and boil for 4 minutes more. Drain the potatoes and corn well before moving them to the bowl. Water clinging to the vegetables can thin the seasoned butter, so let the excess run off instead of tipping them straight into the sauce. Keep the vegetables together; they’ll be divided among the packets in the next stage.
Make the Garlic-Old Bay Coating
Melt the butter in a large bowl, then stir in the minced garlic, Old Bay, black pepper, and juice from half the lemon. Add the drained potatoes and corn, raw shrimp, and sliced sausage. Toss until the butter mixture coats the ingredients rather than sitting in a puddle at the bottom. If the bowl is crowded, toss patiently so the shrimp and sausage get seasoning too.
Seal Four Packets and Bake
Divide the mixture evenly among four 12-by-18-inch sheets of heavy-duty foil, then top each portion with lemon wedges. Fold each sheet into a tightly sealed packet and set the packets on a rimmed baking sheet. Bake for 10-14 minutes, until the shrimp are opaque and a thermometer inserted into the thickest shrimp reads 145°F. Let the packets stand for 2 minutes before carefully opening them.
Two Useful Changes Without Losing the Boil-Style Balance
Make the Packets Dairy-Free
Replace the butter with the same amount of olive oil. It carries the garlic, Old Bay, and lemon across the ingredients, though the coating will taste lighter and less buttery.
Tone Down the Old Bay
For a gentler seasoning, reduce the Old Bay from 1 1/2 tablespoons to 1 tablespoon and keep the other ingredients unchanged. The packets will have less of Old Bay’s bold, peppery character, while the garlic, lemon, and sausage still bring plenty of savory flavor.
Storage and Reheating
- Refrigerator: Transfer leftovers to an airtight container and refrigerate within 2 hours; use within 3-4 days. The shrimp will firm up as they chill.
- Freezer: Freeze cooled portions in an airtight container for up to 2 months. The potatoes may soften and the shrimp can lose some tenderness, so refrigeration gives the best texture.
- Reheating: Remove the food from the foil and warm it covered in a microwave-safe dish in short intervals, or use a covered skillet over low heat. Reheat leftovers to 165°F and stop once they’re hot through; prolonged heating makes shrimp tough.
Questions That Come Up Before the Foil Goes in the Oven
Shrimp Boil Foil Packets
Ingredients
Equipment
Method
- Preheat the oven to 425°F.
- Bring the water and kosher salt to a boil in a 6-quart pot. Add the potatoes and boil for 8-10 minutes, then add the corn and boil for 4 minutes more; drain well.
- Melt the butter in a large bowl and stir in the garlic, Old Bay, black pepper, and juice from half the lemon.
- Add the drained potatoes and corn, shrimp, and sausage to the bowl and toss to coat. Divide evenly among four 12-by-18-inch sheets of heavy-duty foil, top with the lemon wedges, and fold each sheet into a tightly sealed packet; set the packets on a rimmed baking sheet.
- Bake for 10-14 minutes, until the shrimp are opaque and a thermometer inserted into the thickest shrimp reads 145°F.
- Let stand for 2 minutes, then carefully open the packets to avoid the hot steam.
