Buying Prawns for BBQ and Grilling: A Jumbo Prawn Guide
Few things draw a crowd around a rooftop BBQ like a tray of big prawns charring over coals. Grilling is also unforgiving: prawns that are too small dry out or fall through the grill, and badly planned thawing can leave you with frozen centres when guests are already waiting. This guide explains how to buy Jumbo Prawns specifically for BBQ, tandoori and grilling, so the shopping is as smooth as the cooking.
Why Size Matters on the Grill
Open-flame cooking hits prawns with intense, dry heat. A small prawn has very little thickness to protect its centre, so by the time the outside has any colour, the inside is overcooked. Jumbo prawns have thick tails that can take a proper char while the middle stays moist. They are also easier to thread, turn and serve, and they look like the centrepiece they are meant to be.
That doesn't mean jumbo is right for every dish. For gravies and pan starters, Large Prawns are usually more practical, and for rice dishes medium prawns fit better. Jumbo is the grill specialist.
Choosing a Cut for Your Grill Plan
Whole (shell-on): the showpiece
Whole jumbo prawns, heads and all, are the most striking option for a platter. The shell and head act as armour against the flames and keep the meat juicy, and many people enjoy the rich juices in the head. The trade-off: guests peel at the table, so provide finger bowls and plenty of napkins.
Headless (shell-on): the griller's favourite
Headless shell-on prawns are easy to split along the back with kitchen scissors, devein and stuff with garlic or green chutney butter. The shell still protects the meat, but they are neater to eat than whole prawns.
Peeled and Deveined: for tandoori and skewers
For tandoori prawns or tikka-style skewers, you want the masala on the meat, not on the shell. Peeled and Deveined jumbo prawns soak up yoghurt marinades and thread easily. Grill them a little more carefully, since there's no shell to protect them.
| Grill style | Suggested cut | Why |
|---|---|---|
| Whole prawn platter | Whole (shell-on) | Maximum drama and juiciness |
| Garlic butter or chutney butter grilled prawns | Headless (shell-on) | Easy to split and stuff; shell keeps moisture |
| Tandoori prawns, tikka skewers | Peeled and Deveined | Marinade goes straight onto the meat |
How Much to Order
Quantities depend on the rest of your menu. A BBQ with chicken tikka, seekh kebabs and sides needs fewer prawns per person than a seafood-only grill. As a loose guide:
- When prawns are the main event, plan more generously per guest; when they are one of several grilled items, you can scale back.
- Remember that whole prawns carry a lot of weight in heads and shells, and headless shell-on still includes the shell. Peeled prawns are close to all meat.
- Prawns disappear fast at parties. If unsure, round up slightly – extra raw prawns can be frozen if they haven't been thawed.
The easiest approach is to tell FishMart your guest numbers, your other dishes and the cut you want, and ask for a suggestion.
Checking Quality
For grilling, quality shows. When you receive your prawns, check:
- Smell: fresh and briny, like clean seawater. Any ammonia note is a warning sign.
- Heads: on whole prawns, firmly attached, not soft, collapsing or heavily blackened.
- Shells: glossy and snug, without slime or soft patches.
- Flesh: firm and springy to the touch, translucent rather than opaque white when raw.
- Uniform size: evenly sized prawns cook at the same rate, which matters when a whole grill-load needs to finish together.
Plan Your Order Around the BBQ
Timing is half the job with grilled seafood.
- Decide fresh or frozen use. If cooking within 1–2 days, keep the prawns at 0–4 °C. If later, freeze them at -18 °C on the day you receive them.
- Allow thawing time. Jumbo prawns are thick, so frozen ones need a full night in the fridge. Don't rely on a last-minute thaw.
- Clean and marinate ahead. Devein and split the prawns a few hours before, then keep them cold. Add acidic marinades only shortly before grilling.
- Pack a cooler. Keep raw prawns on ice right up to the moment they go on the grill.
Stock and grades vary with the catch, so check the product page or contact FishMart before you finalise your menu.
Gear Worth Having
- Metal skewers, or wooden ones soaked in water for at least 30 minutes.
- A fish or vegetable grill basket for whole prawns.
- Kitchen scissors for splitting shells.
- Separate tongs and plates for raw and cooked prawns.
Common Mistakes
- Buying small prawns for the BBQ. They overcook and slip through the grates.
- Leaving prawns in tandoori marinade overnight. Yoghurt and lemon turn them soft and mealy.
- Grilling over leaping flames. Let the coals settle to a steady glow.
- Putting cooked prawns back on the raw plate. Always use a clean plate.
- Forgetting the vein. In jumbo prawns it is large and gritty – remove it.
Get the Grill Ready
With the right cut, enough thawing time and a cooler full of ice, jumbo prawns are one of the easiest ways to make a BBQ feel special. Pick your cut on the Jumbo Prawns page, browse the Prawns & Shrimp range, and when you're ready to cook, try our tandoori and BBQ jumbo prawn recipes.
Frequently asked questions
Should I buy shell-on or peeled jumbo prawns for grilling?
Shell-on keeps the meat juiciest and looks best on a platter. Peeled and Deveined suits tandoori and skewers where you want the marinade on the meat.
Can I grill prawns straight from frozen?
It isn't recommended for jumbo prawns – the outside chars before the centre is cooked. Thaw them overnight in the fridge first.
How early can I marinate prawns for a BBQ?
Dry spice rubs and oil can go on a few hours ahead in the fridge. Add yoghurt or lemon-based marinades about 20–30 minutes before grilling.
How do I keep prawns safe at an outdoor BBQ?
Keep raw prawns in a cooler on ice until grilling, use separate tongs and plates for raw and cooked prawns, and don't leave cooked prawns sitting in the sun.
