Quick answer: for perfect frozen shrimp: boiling water with 60-70g salt/liter (sea flavor), add shrimp directly from the freezer, cook for 1-5 minutes depending on size (small 1-2 min, medium 2-3 min, large 3-4 min, tiger 4-5 min) and immediately transfer to a bowl with cold water + ice. Thermal shock is the key to juicy texture.
In this article
- Why frozen shrimp can be as good (or better) than fresh
- Types of shrimp: white, red, tiger, prawn, rock shrimp
- Cooking times by size (table)
- Step by step: how to cook them perfectly
- Professional chef's tips
- Common mistakes that ruin good shrimp
- Quick recipes with cooked shrimp
- Pairings and accompaniments
- How to store cooked shrimp
- Frequently asked questions
Why frozen shrimp can be as good (or better) than fresh
There's a widespread myth: that "fresh" shrimp from the counter is always superior to frozen shrimp. The reality is more nuanced. The vast majority of shrimp sold as "fresh" in Spanish fish markets — especially outside coastal areas — have been frozen at the source and then thawed before being displayed. Fishing regulations require immediate temperature reduction after capture (the "cold chain") because raw shrimp deteriorate very quickly.
What truly makes a difference is the freezing technique:
- IQF (Individual Quick Frozen) on board: -40°C in less than 30 minutes after capture. Preserves texture and flavor almost intact. This is what large tuna and shrimp fishing vessels do.
- Slow freezing in industry: -18°C over several hours. Damages cell crystals, making the meat somewhat more mealy.
- Refreezing: the absolute enemy. If you bought it thawed and then freeze it yourself, the texture will be lost.
That's why an IQF frozen shrimp from the Atlantic-Mediterranean can be superior to a "fresh" shrimp displayed for several days on a counter. The important thing is the method and origin, not whether it's cold or frozen when purchased.
Types of shrimp (and prawns): what to order depending on the dish
The lexicon of shrimp in Spain is confusing because it changes by region. The most useful terms for buying are:
| Type | Size (pieces/kg) | Raw color | Typical origin | Best use |
|---|---|---|---|---|
| Rock shrimp | 80-150/kg | Light gray | Atlantic coast | Appetizer with salt, salad |
| Small white shrimp | 50-70/kg | Gray-pink | Mediterranean | Grill, rice dishes |
| Large white shrimp | 30-40/kg | Light pink | Huelva, Morocco | Boil plain |
| Red shrimp | 15-25/kg | Deep red | Denia, Palamós | Boil, grill (premium) |
| Prawn | 15-25/kg | Pink-brown | Vietnam, Ecuador, Huelva | Boil, grill, skewer |
| Scarlet prawn | 8-15/kg | Very deep red | Deep Atlantic | Grill (absolute premium) |
| Tiger prawn | 10-15/kg | Gray stripes | Tropical Asia | Grill, BBQ, stir-fry |
| Small pink shrimp | 40-60/kg | Small light pink | Mediterranean | Appetizer with salt |
If you buy "frozen shrimp" without further specification, it's most common for them to be white or tiger prawns from Asian aquaculture (Vietnam, Ecuador, Thailand). This isn't necessarily an inferior product—aquaculture can be of good quality—but it's important to know to adjust cooking times: farmed prawns are softer and need 30-60 seconds less cooking than wild ones.
Looking for fresh gourmet selection prawns?
Bacalalo's Selected Gourmet Quality Prawns come fresh, vacuum-packed, 250g, ready to cook. Direct selection from the producer, verifiable quality.
View Gourmet Prawns →It's not marketing — there are verifiable factors. Since 1990, we've sold seafood with discernment. When we recommend a fish or a supplier, it's because it's at the Mercat del Ninot stall and because we've tried it. If it doesn't convince us, it doesn't go into the catalog.
Cooking times by size
The correct time ALWAYS depends on the size, not the type. A "small shrimp" and a "rock shrimp" are cooked the same way, even if they are different species. Reference times (counted from when the water returns to a boil after adding the seafood):
| Size (pieces/kg) | Cooking time | Visual indicator | Ice bath rest |
|---|---|---|---|
| Small (40-60/kg) | 1-2 minutes | Float + light pink | 1-2 min |
| Medium (30-40/kg) | 2-3 minutes | Float + bright orange | 2 min |
| Large (15-25/kg) | 3-4 minutes | Float + orange-red | 2-3 min |
| Tiger / jumbo (10-15/kg) | 4-5 minutes | Curved + light red | 3 min |
| Scarlet prawn (8-12/kg) | 5-6 minutes | Bright deep red | 3 min |
Step by step: how to cook them perfectly
Cooking frozen shrimp — Technical recipe
Total time: 10-12 minutes. For 1kg of shrimp (4-6 people as an appetizer).
- Prepare salted water: in a large pot, add 5L water + 300g coarse salt (60g/L). Bring to a rolling boil.
- Prepare ice bath: in parallel, a large bowl with 2L water + plenty of ice + 1 tablespoon coarse salt. Set aside next to the stove.
- Add frozen shrimp: when the water is boiling vigorously, add the shrimp DIRECTLY from the freezer, all at once. The water temperature will drop — turn the heat up to maximum so it returns to a rolling boil quickly.
- Time it: start counting the time from when it comes back to a boil (not before). Follow the cooking time table by size.
- Check: cooked shrimp float to the surface, the shell is bright orange-red (NOT deep red), and the flesh is firm but translucent.
- Remove all at once: with a slotted spoon, transfer ALL the shrimp to the ice bath at once. Do not drain, do not wait — the thermal shock is critical.
- Chill in ice: 2-3 minutes in the ice. The shell will peel easily, and the flesh will be firm and sweet.
- Drain and plate: drain, pat dry lightly with a clean cloth, plate. Sprinkle with flake salt if serving cold as an appetizer.
Professional chef's tips
- Literal seawater: if you live by the coast, clean seawater is the most authentic. If not, 60-70g coarse salt/liter reproduces the salinity.
- Volume matters: 5L of water per kg of shrimp. If you use less, the temperature drops too much when adding the frozen shrimp, and cooking becomes unstable.
- A single bay leaf: optional, but if you add it, one whole leaf and only during the initial boil—remove before adding the shrimp.
- Coarse salt in the ice: the salt in the ice water penetrates the shell during resting, providing that final salty touch that defines professional shrimp.
- Never cover: concentrated steam gives a soft texture. Always keep the pot uncovered.
- Heads for stock: never throw away heads or shells. Freeze them in an airtight bag to make fumet another time. Free seafood broth for rice or soup.
- One batch only: if cooking more than 1kg, it's better to do it in separate batches than to overcrowd the pot. If overloaded, the temperature drops too much, and they cook improperly.
Common mistakes that ruin good shrimp
- Water without enough salt: bland shrimp inside. Cannot be fixed by adding salt at the end.
- Not using ice afterwards: residual cooking continues inside, making the shrimp mealy.
- Cooking after thawing improperly: if you thaw at room temperature or in the microwave, the texture is damaged. Only thaw in the refrigerator for 8-12 hours.
- Overcooking for safety: "better more than less" does NOT apply to seafood. Every 30 extra seconds means a noticeable loss of quality.
- Throwing away the heads: it's 50% of the seafood flavor. Use for stocks, rice dishes, or sauces.
- Refreezing cooked shrimp: destroys the texture. If there are leftovers, it's best to consume within 24 hours or use in a cooked preparation.
- Overcrowding the pot: too many shrimp for too little water = cloudy broth and uneven cooking.
- Adding lemon to the water: acidity deteriorates the texture. Lemon on the side for serving, yes.
Quick recipes with cooked shrimp
1. Classic appetizer with flake salt
Warm or cold cooked shrimp, flake salt, lemon wedges, and a drizzle of extra virgin olive oil. Serve with a fresh white wine (Albariño, Verdejo, Godello) or brut nature cava. The most elegant way to serve them.
2. Sevillian shrimp cocktail
Peeled shrimp with cocktail sauce (mayonnaise + ketchup + brandy + orange juice + Tabasco), on a bed of avocado and finely chopped iceberg lettuce. A classic 80s dish that still works—unpretentious, very effective.
3. Cold seafood salad with tomato and pepper
Mix peeled shrimp with tomato, green and red bell pepper, red onion, all diced. Dress with oil, Sherry vinegar, salt, and parsley. Refrigerate 1 hour before serving. An ideal summer tapa.
4. Octopus and shrimp carpaccio
Modern version: cooked Galician octopus sliced + peeled shrimp fanned out + truffle oil + Maldon salt + a sprig of dill. For a celebration or a quality dinner.
5. Soupy rice with seafood
If you've had an "accident" and overcooked the shrimp, don't throw them away. Minced meat in soupy rice with sofrito + fumet from the heads + saffron. The mealy texture goes unnoticed with the broth.
Galician octopus to accompany your shrimp
If you're assembling a seafood platter, Bacalalo's Galician Cooked Octopus Large Leg 500g is a benchmark: artisanal cooking in seawater, guaranteed tender texture.
View Galician Octopus →Pairings and accompaniments
| Dish | Drink | Solid accompaniment |
|---|---|---|
| Plain cooked shrimp | Albariño, Godello, Verdejo | Rustic bread, flake salt |
| Shrimp cocktail | Brut nature cava | Breadsticks or crackers |
| Seafood salad | Manzanilla en rama or Fino sherry | Thin toasted bread |
| Seafood platter | Brut Champagne, single-estate cava | Salted butter, country bread |
| Soupy shrimp rice | Albariño or Rioja white | Bread to accompany broth |
How to store cooked shrimp
- In the fridge, unpeeled: maximum 48h, ideally 24h. In a sealed container.
- In the fridge, peeled: maximum 24h. Cover with cling film touching the flesh.
- Freezer: DO NOT refreeze shrimp that have already been cooked from frozen. Critical loss of texture.
- Frozen heads and shells: up to 3 months at -20°C. Airtight bag. Ideal for fumets.
- Head stock: boil heads + shells for 30 min with onion and carrot. Strain and freeze in ice cubes. Concentrated broth for rice dishes for months.
In summary
Well-cooked frozen shrimp can be on par with—or even superior to—"fresh" counter shrimp. The key lies in three points: seawater (60-70g salt/liter), precise cooking times based on size (1-5 minutes depending on caliber), and a final ice bath to stop the cooking. Without these three factors, the result is mediocre. With them, it's restaurant-quality.
Just as important as cooking them well is choosing the right product: if you buy IQF (individual quick frozen at origin) from a good source, you start with an advantage. If you buy frozen products of uncertain quality, no cooking trick will salvage the result.
For a complete gourmet seafood platter, complement with cooked Galician octopus, artisanal anchovy gildas, and premium canned seafood. Visit Bacalalo's Gourmet Canned Goods collection to complement.
Frequently asked questions
How long do you cook frozen shrimp?
It depends on the size. Small shrimp (40-50/kg): 1-2 minutes from when the water returns to a boil. Medium (30-40/kg): 2-3 minutes. Large prawns (15-25/kg): 3-4 minutes. Jumbo or tiger shrimp (10-15/kg): 4-5 minutes. The rule: when they start to float and the shell is bright red-orange, they are ready. Overcooking = tough and mealy flesh.
Do you cook frozen shrimp directly or do you need to thaw them?
Both methods work, but the result is different. Directly frozen: VERY abundant water (5L/kg) boiling vigorously, better texture because the cold "sets" the protein. Thawed: more uniform cooking, less risk of a cold center, but slightly softer texture. If you're in a hurry: cook directly. If you want maximum precision and elegance: thaw first in the refrigerator for 8-12 hours.
How much salt does the water need for cooking shrimp?
The professional rule: 60-70g of salt per liter of water (3-4 heaped tablespoons). It should taste like "sea water." Without this concentration, the shrimp won't be seasoned inside and will be bland. Don't be afraid of the quantity—the seafood only absorbs what it needs. If it's not well salted, adding a lot of salt afterward won't fix it.
Should you use ice afterwards?
Yes, almost always. Once cooked, the shrimp should be immediately transferred to a bowl with VERY cold water + ice + coarse salt. This stops the cooking through thermal shock (from 100°C to 0°C in seconds) and firms up the flesh. Without this step, residual cooking continues inside, and the shrimp become mealy. The ice bath is the secret that differentiates professional shrimp from homemade shrimp.
Do frozen shrimp taste the same as fresh shrimp?
If frozen correctly (at -40°C at sea minutes after capture, IQF technique), the flavor and texture are practically identical. "Fresh" shrimp at the counter is almost always thawed shrimp — commercial Spanish fishing requires immediate temperature reduction. That's why good quality frozen shrimp from the Atlantic-Mediterranean can be superior to "fresh" shrimp at the counter. What truly matters: that it has only been frozen once (not refrozen).
What happens if I overcook them?
Overcooked shrimp lose their juicy texture, the meat becomes mealy, separates from the shell with difficulty, and the iodine flavor increases to an invasive degree. The shell turns deep red (instead of orange-pink). There's no fix for it. That's why it's better to undercook by 15 seconds than overcook by 30 seconds.
Can I use shrimp that were cooked poorly for something else?
Yes. If you overcooked them, don't throw them away: use the meat for rice, fideuá, paella, croquettes, cold salpicón with plenty of citrus dressing or cocktail sauce. The mealy texture is disguised when accompanied by sauce or mixed with other ingredients. The heads and shells are never thrown away — instant seafood broth for the next 3 days.
How much do raw vs. cooked frozen shrimp yield?
They lose ~15% of their weight when cooked (internal water). 1kg of raw frozen shrimp = ~850g cooked. If you peel them after cooking, you lose ~50% more (shell, head, gut) — leaving ~425g of clean meat. For a generous appetizer portion (including heads + shells), calculate 200-250g of raw frozen shrimp per person.
Do I need to add lemon or bay leaf to the water?
It's not necessary. Salt alone does all the work for quality shrimp. If you add bay leaf, one whole leaf is enough — more will mask the flavor. Lemon in the water is best avoided: the acidity deteriorates the texture of the shell and can give a metallic taste. If you want that citrus aroma, it's better to serve with lemon wedges on the side.
How do you store cooked shrimp?
In the refrigerator, covered and unpeeled, for a maximum of 48 hours. Ideally, consume the same day. If peeled, maximum 24 hours. DO NOT refreeze cooked shrimp — the texture will be destroyed. If you have leftovers, it's better to use them in rice, salpicón, or broth within the next 24-48 hours. Heads and shells can be frozen at -20°C for up to 3 months to make broth later.
