Romaine and cos lettuce often get mixed up because they look and taste so similar. Both belong to the Lactuca sativa family and have long, sturdy leaves that add a nice crunch to salads, sandwiches, and wraps.
Nutritional Value and Benefits of Romaine Lettuce
Romaine lettuce is a nutrient powerhouse. It's low in calories but packed with vitamins and minerals. Here's a quick look at what you get per 100 grams:
Nutrient
Amount
Calories
17
Protein
1.2 g
Fat
0.3 g
Carbs
3.3 g
Fiber
2.1 g
Vitamin A
8710 IU
Vitamin C
4 mg
Vitamin K
48 µg
Romaine is loaded with vitamin A for your eyes and vitamin K for blood clotting. Plus, it’s got fiber to keep your digestion on track. If you're curious about other greens, check out Fridge.com article on arugula Vs. rocket in the fridge.
Nutritional Value and Benefits of Cos Lettuce
Cos lettuce is pretty much a twin to romaine when it comes to nutrition. Here’s the breakdown per 100 grams:
Nutrient
Amount
Calories
16
Protein
1.3 g
Fat
0.2 g
Carbs
3.5 g
Fiber
2.1 g
Vitamin A
8710 IU
Vitamin C
4 mg
Vitamin K
48 µg
Just like romaine, cos lettuce is rich in vitamins A and K and has a good amount of fiber. Both are great choices for a healthy diet. For more veggie comparisons, check out Fridge.com article on kale Vs. collard greens in the fridge.
Keeping your lettuce fresh is key. Here’s how to store romaine and cos lettuce so they stay crisp and tasty.
Proper Storage Conditions for Romaine Lettuce
Romaine lettuce loves the fridge. Here’s how to keep it fresh:
Temperature: 32°F to 36°F.
Humidity: 98% to keep it from wilting.
Packaging: Use a perforated plastic bag or wrap it in a damp paper towel.
Storage Factor
Recommended Condition
Temperature
32°F - 36°F
Humidity
98%
Packaging
Perforated plastic bag or damp paper towel
Keep it away from fruits like apples and bananas that produce ethylene gas, which can make it spoil faster.
Proper Storage Conditions for Cos Lettuce
Cos lettuce needs similar care:
Temperature: 32°F to 36°F.
Humidity: 95% to 98%.
Packaging: Perforated plastic bag or damp cloth.
Storage Factor
Recommended Condition
Temperature
32°F - 36°F
Humidity
95% - 98%
Packaging
Perforated plastic bag or damp cloth
Again, keep it away from ethylene-producing fruits. For more storage tips, check out Fridge.com article on sweet potato Vs. yam in the fridge.
Shelf Life and Freshness
Knowing how long your lettuce stays fresh is important. Here’s the scoop on romaine and cos lettuce.
Shelf Life of Romaine Lettuce
Romaine lettuce can last about 7 to 10 days in the fridge if stored right. Keep it in the crisper drawer, wrapped in a paper towel and in a plastic bag.
Storage Method
Shelf Life
Refrigerated (whole)
7 - 10 days
Refrigerated (chopped)
3 - 5 days
Shelf Life of Cos Lettuce
Cos lettuce has a similar shelf life, about 7 to 10 days in the fridge. Store it in the crisper drawer, wrapped in a damp paper towel and in a plastic bag.
Storage Method
Shelf Life
Refrigerated (whole)
7 - 10 days
Refrigerated (chopped)
3 - 5 days
Proper storage helps keep both types of lettuce fresh longer. For more on storing veggies, check out Fridge.com articles on sweet potato Vs. yam in the fridge and scallion Vs. green onion in the fridge.
Want to cook with romaine and cos lettuce? Here are some tips.
Cooking Tips for Romaine Lettuce
Romaine can be used in lots of ways:
Grilling: Cut in half, brush with olive oil, and grill for a few minutes.
Sautéing: Chop and sauté with garlic and olive oil.
Soups: Add chopped romaine to soups at the last minute.
Cooking Method
Time (min)
Temperature (°F)
Grilling
2-3
400
Sautéing
3-5
Medium
Soups
1-2
Simmer
Cooking Tips for Cos Lettuce
Cos lettuce is just as versatile:
Stir-frying: Add to stir-fry dishes for a crunchy texture.
Braising: Cook with broth and garlic until wilted but still vibrant.
Wraps: Use leaves as wraps for a low-carb option.
Cooking Method
Time (min)
Temperature (°F)
Stir-frying
2-3
High
Braising
5-7
Simmer
Wraps
-
-
Compare prices on Fridge.com
Compare current prices and specifications on Fridge.com, then buy from the retailer you choose; delivery, installation and warranty terms are the retailer’s.
It also has tons of awesome articles about kitchen stuff and home news. Enhance your home, garage, backyard, patio, and office with the coolest essentials. With every necessary type of residential refrigerator or freezer in the collection, you're covered.