You can microwave frozen shrimp in under 10 minutes, whether you’re cooking them from raw or reheating pre-cooked shrimp. The key is using reduced power (around 70%) and adding a small amount of liquid to prevent the shrimp from turning rubbery. The process differs slightly depending on whether your shrimp are raw or pre-cooked, so check your bag first.
Raw vs. Pre-Cooked: Check the Bag First
Most frozen shrimp sold in grocery stores are pre-cooked. You can tell because they’ll be pink or orange and the packaging will say “cooked” or “ready to eat.” Raw frozen shrimp are gray or translucent and labeled “raw” or “uncooked.” This matters because raw shrimp need to reach an internal temperature of 145°F to be safe, while pre-cooked shrimp only need to be warmed through.
Defrost Before You Cook
Trying to cook a solid block of frozen shrimp in the microwave leads to uneven results, with some pieces overdone and others still icy in the center. The fastest way to defrost is to put the shrimp in a colander and run cold water over them for 3 to 5 minutes. They thaw quickly because they’re small. Pat them dry with a paper towel before microwaving.
If you’d rather use the microwave to defrost, use the defrost setting in 30-second intervals, checking between each round. Stop as soon as the shrimp are pliable but still cold. Then proceed with cooking or reheating.
Microwaving Raw Frozen Shrimp
Spread about 8 ounces of thawed shrimp in a single layer on a microwave-safe plate or shallow dish. Don’t pile them on top of each other, or the ones in the middle will stay undercooked while the outer ones turn tough. Add a tablespoon or two of water to the dish and loosely cover it with a damp paper towel or microwave-safe lid. This traps steam and helps the shrimp cook evenly without drying out.
Set your microwave to 70% power and cook for 4 to 5 minutes. Check them at the 3-minute mark. Raw shrimp are done when they’ve curled into a loose C shape and turned pink all the way through. If they’ve curled into a tight O, they’re overcooked. The internal temperature should hit 145°F if you want to verify with a thermometer, though the visual cues are reliable once you know what to look for.
Let them rest for a minute before eating. They’ll continue to carry over a small amount of heat, which finishes the cooking without you risking extra time in the microwave.
Reheating Pre-Cooked Frozen Shrimp
Pre-cooked shrimp are already fully cooked, so the goal is just to warm them through without making them chewy. Overcooking is the number one problem here, and it happens fast because the shrimp are already done. Lower heat and a bit of moisture are your best tools.
After thawing, place the shrimp in a single layer in a microwave-safe dish. Add enough liquid to come about one-quarter of the way up the shrimp. Water works fine, but you’ll get better flavor from broth, a squeeze of lemon juice, or a drizzle of olive oil. Cover loosely.
Microwave at 50% to 70% power in 1-minute intervals. Check after each interval by touching one of the larger pieces. As soon as the shrimp feel hot to the touch, they’re ready. The whole process should take no more than 5 to 6 minutes, and often less. Leaving them in even a minute too long can push the texture from tender to rubbery.
Getting Better Flavor From the Microwave
Microwaved shrimp won’t develop the sear or char you’d get from a skillet, but you can still make them taste good. Before microwaving, toss the thawed shrimp with a little garlic powder, paprika, salt, and a drizzle of oil. The seasoning won’t brown, but it will infuse into the shrimp as they steam.
Another option is to microwave the shrimp plain and then toss them into a sauce, soup, or stir-fry right after. Since they’re already cooked, you just need to combine them with the other dish for a minute to let the flavors meld. This is often the best approach when you’re adding shrimp to pasta, rice bowls, or salads.
Common Mistakes to Avoid
- Using full power. High heat cooks the outside of the shrimp faster than the inside, giving you a tough, chewy texture. Stick to 70% power or lower.
- Skipping the liquid. Shrimp dry out quickly in a microwave. Even a tablespoon of water creates enough steam to keep them moist.
- Cooking too many at once. Piling shrimp on top of each other means the ones in the center won’t heat evenly. Work in batches if you’re cooking more than 8 ounces.
- Walking away. Shrimp go from perfectly done to overcooked in about 30 seconds. Stay nearby and check frequently.
- Microwaving from frozen without thawing. This almost always results in some shrimp being rubbery while others are still cold. A quick cold-water thaw takes only a few minutes and makes a noticeable difference.