12 garlic cloves for 1½ lb (700 g) of shrimp sounds like too much until you taste what slow heat does to it. Camarones al mojo de ajo (kah-mah-ROH-nehs ahl MOH-ho deh AH-ho) are Mexican garlic shrimp: shrimp seared in butter and oil, then tossed with minced garlic that has been cooked gently until it turns golden, sweet and a little crunchy, finished with lime and herbs and spooned over rice. In Mexico, al mojo de ajo means fish or seafood cooked in plenty of chopped garlic with oil or butter, and on the coast it’s most often shrimp. The trick I use is to cook the garlic first, take it out of the pan, and only bring it back once the shrimp are done.
What camarones al mojo de ajo are, and who they’re for
How do you make Mexican garlic shrimp? Cook a head of minced garlic in oil and butter over medium-low heat until straw-colored, then scrape it into a bowl. In the same skillet over medium-high heat, sear raw shrimp 4 to 5 minutes, until pink, opaque and curled into a C, 145°F (63°C). Off the heat, return the garlic with lime juice and parsley. Ready in 25 minutes for 4 servings.
If you know shrimp scampi, you’re halfway there. Both are shrimp in garlic butter with citrus. Scampi usually has a few cloves of garlic, white wine and lemon, and goes over pasta. Mojo de ajo uses three cloves per person, toasted until golden, plus lime, and goes over rice. It tastes more of toasted garlic and less of wine, and for me it’s the better weeknight dinner of the two because it needs nothing you don’t already have.
It suits a weeknight for 4, a Lent Friday, or a crowd if you cook the shrimp in batches. It’s 25 minutes from start to finish, nearly all hands-on, or 15 with peeled shrimp, and it’s an easy recipe: the only skills are pulling the garlic at straw color and the shrimp at a C.
Skip it for anyone with a shellfish allergy. If you want shrimp in a thick, spicy red sauce instead, that’s camarones a la diabla, made with three dried chiles.
Buying shrimp in a US or UK supermarket
For a main course over rice, plan on 6 oz (175 g) of raw peeled shrimp per person. The numbers on the bag are a count: 21/25 means 21 to 25 shrimp make a pound. The size word next to it isn’t standardized, so 21/25 can say “jumbo” on one brand and “extra large” on another. Go by the count. In the UK, the closest thing is raw king prawns, often labeled per kilo, and 46 to 55 per kilo is the same as 21/25 per pound.
| Count per lb | Per kg | Total minutes in the pan | Notes |
|---|---|---|---|
| 41/50 | 90-110 | 2-3 min | fine for tacos, easy to overcook |
| 31/40 | 68-88 | 3-4 min | cheaper, works well |
| 21/25 | 46-55 | 4-5 min | this recipe, the easiest to get right |
| 16/20 | 35-44 | 5-6 min | check 145°F (63°C) with a thermometer |
The doneness cue for shrimp is flesh that turns firm, pearly and opaque, and 145°F (63°C) at the center. In the pan I go by shape: raw shrimp are nearly straight, cooked ones curl into a loose C, and overcooked ones close into a tight O. By then they’re tough, and there’s no fixing it.
Thawing frozen shrimp safely. Overnight in the fridge, or in a sealed bag submerged in cold water, changing the water every 30 minutes, which takes an hour or less for 1 lb (450 g). Cook them right after, and never thaw on the counter. Then pat them dry until the paper towel stays dry: water left on the shrimp keeps them from browning.
Precooked shrimp. They’re already cooked, so all you can do is warm them. Thaw, dry, and toss them in the hot mojo with the heat off for 60 to 90 seconds. Any longer and you’re cooking them twice.
Shell-on. More flavor, and the shell protects the shrimp a little from overcooking, but they’re eaten with your hands. Snip down the back through the shell, pull out the vein and give them 1 minute more than peeled shrimp of the same count. The dark vein is the shrimp’s digestive tract; I always remove it because it can be gritty.
Ingredients and swaps from a regular grocery store
Nothing here needs a Mexican grocery except the optional guajillo, which most large US supermarkets stock in the Hispanic aisle in bags of dried chiles. In the UK, Mexican food specialists online carry them.
| Ingredient | Swap | What changes |
|---|---|---|
| Fresh garlic, 12 cloves (1¼ oz / 36 g) | none worth using | Jarred minced garlic sits in liquid and spatters; garlic powder won’t toast |
| Butter, 3 tbsp (42 g) | 3 more tbsp (45 ml) olive oil | Dairy-free and closer to Spanish gambas al ajillo, less rich |
| Limes, 2 | Lemons, same amount | A different aroma, similar sharpness |
| Guajillo chiles, 2 (½ oz / 12 g) | 1 tsp sweet paprika, stirred in with the heat off | Gives the red color but not the fruity flavor |
| Parsley | Cilantro | Cilantro tastes more like the Mexican coast; both work |
| Raw shrimp | Frozen raw shrimp, thawed | Same result if thawed and dried |
Equipment. An 11 to 12 inch (28 to 30 cm) skillet, ideally heavy-bottomed, a heatproof bowl and paper towels. With a smaller pan, cook the shrimp in two batches; crowded shrimp release water and steam. An instant-read thermometer is optional but settles any doubt with 16/20 shrimp.
Game plan, make-ahead and cooking for a crowd
25 minutes, almost all of it hands-on. If you’re serving it with Colombian white rice or Mexican red rice, start the rice first. It takes longer than the shrimp.
Why the garlic comes out of the pan
Minced garlic browns in a few minutes over medium-low and burns in seconds over high heat, which is exactly what shrimp need to sear without leaking water. Cook them together and you have to choose between pale, stewed shrimp and bitter garlic. Starting the garlic in cold fat gives it time to flavor the butter before it colors, and moving it to a bowl keeps it away from the high heat. When it goes back in with the burner off, the hot pan is enough to bring everything together in 30 seconds.
What to look for.
- Garlic at 2 minutes → smells strong, still white.
- Garlic at 4 to 5 minutes → straw-colored with barely golden edges. Pull it now.
- Garlic gone too far → dark brown and acrid. It will make the whole dish bitter, so start again; it’s 5 minutes.
- Shrimp ready to flip → after 2 minutes they release from the pan on their own, with pink and golden patches.
- Shrimp done → pink and opaque on both sides, firm but not hard, curled into a C.
Make-ahead. Peel and devein the shrimp the day before and keep them dry and covered in the fridge; fresh raw shrimp keep 1 to 2 days. The mojo can be made ahead too, in a sealed jar in the fridge, but garlic in oil keeps 4 days at most, always refrigerated at 40°F (4°C) or below and never at room temperature. The butter sets solid when cold, so warm it over the lowest heat until liquid.
Scaling up.
| People | Peeled shrimp | Garlic | Butter | Oil | Batches in a 12 inch pan |
|---|---|---|---|---|---|
| 4 | 1½ lb (700 g) | 12 cloves, 1 head | 3 tbsp (42 g) | 2 tbsp (30 ml) | 1 |
| 8 | 3 lb (1.4 kg) | 24 cloves, 2 heads | 6 tbsp (84 g) | ¼ cup (60 ml) | 2 |
| 12 | 4⅔ lb (2.1 kg) | 36 cloves, 3 heads | 9 tbsp (126 g) | 6 tbsp (90 ml) | 3 |
| 20 | 7¾ lb (3.5 kg) | 60 cloves, 5 heads | 15 tbsp (210 g) | ⅔ cup (150 ml) | 5 |
For 12 or more, make all the mojo in one saucepan over medium-low and go by color, not the clock: a bigger batch takes a little longer. Sear the shrimp in 1½ lb (700 g) batches with 1 tbsp of the mojo fat each, move them to a platter, then toss everything with the warm mojo and lime at the end. Cooked shrimp can be served warm or at room temperature, coated in the mojo, for up to an hour; never leave them out of the fridge for more than 2 hours.
Mistakes, spice level, kids and allergens
- Bitter garlic → it went too dark, or it cooked over high heat with the shrimp. Cold fat, medium-low, out of the pan at 4 to 5 minutes.
- Rubbery shrimp → overcooked, usually while waiting for the garlic, or left in a hot pan before serving. 4 to 5 minutes for 21/25, then onto plates.
- Pale shrimp in a puddle → they were wet or crowded. Dry them and cook in one layer, in batches if needed.
- Raw, harsh garlic → heat too low or pieces too big. Mince to ⅛ inch (2 to 3 mm) and wait for straw color.
- Bland → not enough salt on the shrimp before cooking, or not enough lime at the end. Sweet garlic needs the acid.
Heat level. 0 out of 5 without guajillo, 1 out of 5 with it: guajillo runs 2,500 to 5,000 Scoville heat units, mild for a dried chile. For more kick, snip in one dried chile de árbol with the guajillo.
Kids. Usually a hit. Golden garlic loses the bite of raw garlic and turns sweet.
Allergens. Shellfish (crustaceans), one of the 9 major allergens in the US and one of the 14 that must be declared in the UK and EU, and milk from the butter; use all olive oil and it’s dairy-free. No gluten, egg or nuts.
Versions worth knowing
- Short on time → buy peeled, deveined shrimp. It saves 10 minutes and the dish takes 15. Still mince the garlic yourself.
- Al ajillo, with guajillo → in many Mexican kitchens, garlic shrimp with guajillo rings are called camarones al ajillo. Use 3 or 4 guajillos and a chile de árbol.
- With chipotle → 1 or 2 chipotles in adobo cut into strips, stirred into the mojo with the heat off. Smoky and hot.
- Blended mojo → some cooks blend the garlic with onion, water and salt, fry it in oil and pour it over shrimp cooked in butter. Smoother, with no toasted bits.
- Lighter → 1 tbsp oil and 1 tbsp butter instead of 2 and 3, about 80 calories less per plate.
- Vegetarian → 1⅓ lb (600 g) quartered cremini mushrooms; in my pan they need 6 to 8 minutes over medium-high to release and cook off their water. Same mojo.
- As tacos → 3½ oz (100 g) shrimp per person in warm corn tortillas with a spoonful of mojo and chopped onion.
Other shrimp dishes. Cold and zesty, try the Mexican shrimp cocktail, shrimp aguachile, raw shrimp cured in lime and chile, or shrimp ceviche. On a cold day, the Mexican shrimp soup.
What Mexican garlic shrimp cost for 4
With shrimp at an average supermarket feature price of 8.53 dollars a pound in the second quarter of 2026, plus butter, garlic, limes, cilantro and long-grain rice at 2026 average US prices, dinner for 4 comes to about 16.43 dollars, or 4.11 a plate. Oil, chiles and salt aren’t counted.
Yield. 4 plates of about 6 oz (175 g) shrimp with mojo, plus rice. As a snack or in tacos, it stretches to 6 or 8.
Where the money goes. Shrimp are 80 % of the cost, and that average price doesn’t specify a count, so 21/25 shrimp usually cost more per pound. To spend less, buy frozen raw, which gives the same result when thawed properly, or drop to 31/40 and take 1 minute off the cooking time.
Serving, storing and reheating without rubbery shrimp
Serving. Over white or red rice to catch the juices, with a green salad with tomato and avocado, lime wedges, and warm tortillas or crusty bread for the garlic butter left in the pan. Don’t pour that away.
Fridge. Cooked seafood keeps 3 to 4 days at 40°F (4°C) or below, in a covered container with its mojo. No more than 2 hours at room temperature.
Freezer. Cooked shrimp can be frozen, but they thaw wet and firmer. I freeze raw shrimp instead and cook to order.
Reheating. Leftovers should be reheated to 165°F (74°C), and the shrimp were done at 145°F (63°C), so reheated shrimp are always a bit firmer. Use a small skillet over low heat, covered, with 1 tbsp water, stirring for 2 to 3 minutes; or microwave in 30-second bursts, stirring between. Better still, eat them cold in tacos, on a tostada or over salad, where they lose nothing.
Camarones al mojo de ajo FAQ
What’s the difference between camarones al mojo de ajo and garlic butter shrimp? The amount and the cooking of the garlic. Mojo de ajo uses about 3 cloves per person, minced and slowly toasted until golden and sweet, with lime. Most garlic butter shrimp use a few cloves, barely cooked, with lemon.
How long do you cook 21/25 shrimp? 4 to 5 minutes total over medium-high heat, about 2 minutes per side, until pink, opaque and curled into a C, or 145°F (63°C) inside. 31/40 shrimp need 3 to 4 minutes.
Why does my garlic shrimp taste bitter? The garlic burned, usually because it cooked over high heat alongside the shrimp. Cook it first over medium-low, take it out at straw color, then sear the shrimp.
Can I use frozen shrimp? Yes. Thaw them overnight in the fridge or in a sealed bag in cold water, changing the water every 30 minutes, and dry them well before cooking.
Can I use precooked shrimp? Only to warm through: 60 to 90 seconds in the hot mojo with the heat off. They’ll be firmer and won’t absorb as much garlic.
Can I make it ahead? Make the mojo up to 4 days ahead and keep it refrigerated. Cook the shrimp just before serving, or up to an hour ahead if you’ll serve them at room temperature.
How much shrimp for 10 people? About 3⅞ lb (1.75 kg) of raw peeled shrimp as a main course, or 2¼ lb (1 kg) as a snack or for tacos. Cook it in 1½ lb (700 g) batches.
Nutrition per serving
Per serving (about 6 oz / 175 g shrimp with its mojo, no rice), calculated ingredient by ingredient from this recipe and counting all of the fat, even though some stays on the plate. For guajillo I used dried ancho chile as the closest reference:
- Calories: 309 kcal
- Protein: 36 g, nearly all from the shrimp
- Carbohydrates: 6 g
- Fat: 17 g, of which 6 g saturated
- Fiber: 1 g
- Sodium: 602 mg
Per plate, the oil accounts for about 60 calories and the butter for about 75. The shrimp themselves bring 208 mg of the sodium and the salt 388 mg. Serving it over rice? Each cup of cooked white rice adds 45 g of carbohydrates and about 205 calories.
I grew up putting garlic on almost everything, and in Venezuela it often shows up as a garlic sauce on the table. What this dish taught me is to let garlic take its time and to get it out of the way before the pan gets hot. The shrimp only need 4 minutes; the garlic deserves 5 of its own. Josnaisis.