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Per 100g
Nutrition data source: USDA FoodData Central
Common measurement equivalents in grams
Yes, yellow onions are highly nutritious and rich in antioxidants like quercetin, which helps reduce inflammation and lower blood pressure. They also contain sulfur compounds that support heart health and prebiotic fibers that promote a healthy gut microbiome.
With only 40 calories per 100g and virtually no fat, yellow onions are an excellent addition to a weight loss diet. Their fiber content helps you feel full longer, and they add significant flavor to dishes without the need for high-calorie sauces.
Yellow onions contain about 9.34g of carbohydrates per 100g, which is moderate. While they can be included in a keto diet, they should be used in moderation to ensure you stay within your daily net carb limits, especially when caramelized.
Yes, yellow onions are a natural vegetable and are both 100% vegan and gluten-free. They are a safe and flavorful staple for almost all dietary patterns and are used globally as a base for many dishes.
Yellow onions have a sharp, pungent flavor and a strong aroma when raw. However, they have a high sugar content that becomes incredibly sweet and mellow when cooked, making them the most versatile 'all-purpose' onion for the kitchen.
Yes, you can eat them raw, though they have a stronger 'bite' than white or red onions. To mellow the flavor for use in salads or sandwiches, you can soak sliced yellow onions in cold water for 10 to 15 minutes before serving.
Store whole yellow onions in a cool, dry, and dark place with plenty of ventilation, such as a mesh bag or open basket. Avoid storing them in the refrigerator or near potatoes, as the moisture and gases can cause both to spoil faster.
yellow onions is a versatile ingredient found in cuisines around the world. With 40 calories per 100g and 1.1 grams of protein, it's a nutritious addition to many dishes.
Explore more ingredients in the vegetable category with complete nutrition information.
View all vegetable →Discover 10 recipes featuring yellow onions with step-by-step instructions.
Browse recipes →When stored properly in a cool, dark place, whole yellow onions can last for 4 to 6 weeks. Once cut, they should be wrapped tightly or placed in an airtight container and refrigerated, where they will stay fresh for about 7 to 10 days.
Yellow onions are best suited for long cooking processes like caramelizing, roasting, or simmering in soups and stews. Their high sulfur and sugar content allows them to brown beautifully, providing a deep, savory-sweet base for many recipes.
When cut, yellow onions release a sulfur-based gas that reacts with the moisture in your eyes to form a mild sulfuric acid. To minimize tearing, use a very sharp knife to reduce cell damage, or chill the onion in the refrigerator before slicing.
