Navigating the world of frozen seafood can feel overwhelming. You want the convenience and quality of restaurant-grade ingredients, but the sheer variety of frozen prawns available online can be confusing. From different sizes and preparations to understanding what the labels mean, choosing the right product for your recipe is key.
This guide is designed to simplify the process. As a Joybuy Product Recommendation Officer, my role is to help you understand the options so you can confidently buy prawns online. We will look at the key differences between prawn types, what to look for in terms of quality and highlight a few recommendations that suit various culinary needs.
Your Guide to Selecting Frozen Prawns
Before adding a pack to your basket, understanding a few key terms can make all the difference. This will ensure you get exactly what you need for that perfect curry, paella or simple garlic prawn dish.
1. Decoding Prawn Sizes (e.g., 20/30, 31/40)
You will often see numbers like 20/30 or 31/40 on packs of frozen king prawns. This isn't a measure of length, but rather the count of prawns per kilogram (or sometimes pound).
- Lower numbers mean larger prawns: A pack labelled 20/30 contains between 20 and 30 prawns per kg. These are typically extra-large prawns, ideal for grilling or as a centrepiece.
- Higher numbers mean smaller prawns: A pack labelled 31/40 contains 31 to 40 prawns per kg. These medium-sized prawns are versatile and work well in stir-fries, pasta dishes and curries where they are mixed with other ingredients.
2. Head-On, Shell-On (HOSO) vs. Peeled & Deveined (P&D)
The preparation of the prawn significantly impacts both flavour and convenience.
- Head On Shell On (HOSO) Prawns: Many chefs prefer head on shell on prawns because the shell and head lock in moisture and impart a deeper, more intense seafood flavour during cooking. The heads and shells are also invaluable for creating rich, flavourful stocks and bisques. This option requires more prep work but offers a greater culinary reward.
- Peeled and Deveined (P&D) Prawns: For ultimate convenience, peeled and deveined prawns are the go-to choice. The shell is removed and the intestinal tract (the "vein") along the back is taken out, making them ready to cook straight from the bag after thawing. This saves considerable time in the kitchen, making them perfect for quick weekday meals.
3. The IQF Advantage
IQF stands for Individually Quick Frozen. This is a process where each prawn is frozen separately, rather than in a solid block. IQF prawns are a hallmark of quality for two main reasons:
- Preservation: The rapid freezing process creates smaller ice crystals, which helps maintain the firm texture and fresh flavour of the prawns.
- Convenience: You can easily take out the exact number of prawns you need for a meal, leaving the rest perfectly frozen for another time. This reduces waste and makes portion control simple.
Our Top Recommendations for 2026
Based on their preparation, size and suitability for different dishes, here are a few standout options to consider for your home cooking.
ECUAGOLD Frozen Head On Shell On Raw (XL-20/30) Prawn 1Kg
- Why It Stands Out: These prawns are for the flavour purist. The Head-On Shell-On (HOSO) format is specifically chosen to maximise taste. Sourced from Ecuador, these raw frozen prawns have a naturally sweet and delicate profile that is protected by the shell during cooking, resulting in exceptionally juicy and succulent meat.
- Pros:
- Maximum Flavour: The head and shell provide a rich, umami depth perfect for stocks and sauces.
- Extra-Large Size (20/30): Their impressive size makes them ideal for grilling, barbecues or as the star of a paella.
- Individually Frozen: Easy to portion out exactly what you need.
- Who is it for?
- Home cooks who enjoy making stocks, bisques or sauces from scratch.
- Anyone hosting a dinner party or barbecue who wants to present an impressive-looking dish.
- Food enthusiasts looking for an authentic, deep seafood flavour.
ROYAL STAR Raw Peeled & Deveined Prawn IQF (XL-21/25) 700g net
- Why It Stands Out: This product offers the perfect balance of premium quality and kitchen convenience. These extra-large peeled and deveined prawns are completely prep-free, allowing you to create gourmet meals without the fuss. The raw state means they absorb marinades beautifully, and the IQF process ensures a firm, satisfying texture.
- Pros:
- Chef-Ready: No peeling or deveining required, saving significant preparation time.
- Extra-Large Size (21/25): A substantial size that holds up well to high-heat cooking methods like searing or grilling.
- Versatile: The raw, neutral flavour is a blank canvas for garlic, chilli, herbs and spices.
- Who is it for?
- Busy home cooks who value convenience but don't want to compromise on quality.
- Those looking for a quick yet elegant ingredient for dishes like gambas al ajillo or prawn skewers.
- Anyone who dislikes the task of peeling and deveining prawns.
ROYAL STAR Raw Peeled & Deveined Prawn IQF (M-31/40) 700g net
- Why It Stands Out: These are the ultimate workhorse prawns for a wide range of everyday dishes. Offering the same time-saving convenience as their larger counterpart, this medium-sized (31/40 count) option is perfectly suited for being mixed into larger recipes. They provide that essential succulent bite without overpowering the other ingredients.
- Pros:
- Extremely Convenient: Fully peeled, deveined and ready to be added to any dish.
- Versatile Size: Ideal for Thai green curries, stir-fries, noodle dishes and risottos.
- IQF Format: Allows for easy portioning, whether you're cooking for one or for the whole family.
- Who is it for?
- Home cooks who regularly make curries, pasta or stir-fries and need a reliable, easy-to-use protein.
- Anyone looking for a cost-effective way to incorporate high-quality prawns into weekly meals.
- Families needing a quick and healthy protein option that appeals to everyone.
Looking for Other Options?
The world of prawns is vast and delicious. If you're interested in exploring different varieties, such as the popular and visually striking tiger prawn, there are many more options to discover.
️ Explore our full range of tiger prawn products here.
Frequently Asked Questions
1. Do I need to defrost frozen prawns before cooking? For the best texture, it is highly recommended to thaw raw frozen prawns before cooking. The ideal method is to place them in the refrigerator overnight. For a quicker thaw, you can put the frozen prawns in a colander and run them under cold water for a few minutes until they are pliable. Avoid using warm water or a microwave, as this can start to cook the prawns and result in a rubbery texture.
2. How can you tell if frozen prawns are good quality? Look for prawns that are Individually Quick Frozen (IQF), as this helps preserve their texture. They should look firm and translucent, without excessive ice crystals or signs of freezer burn (dry, discoloured spots). Once thawed, they should have a fresh, mild sea scent, not a strong or "fishy" odour.
3. What is the difference between prawns and shrimp? In the UK, the terms are often used interchangeably. Biologically, there are differences in their body shape and anatomy, but for culinary purposes, they can generally be substituted for one another. "King prawns" or "tiger prawns" typically refer to larger species, while "shrimp" might be used for smaller varieties, but this is not a strict rule in retail. Focus on the size and preparation type that best suits your recipe.
