Are onions suitable for keto? If you’re on a ketogenic diet, it’s important to understand the carbohydrate content of different foods. While undoubtedly delicious, onions do contain carbohydrates, which can affect your keto diet goals. In this article, we examine the carbohydrate content of different types of onions, including yellow, red, white, and green onions, to help you make informed choices while enjoying the flavor that onions bring to your low-carb diet. Masu.
In this post you will learn:
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Are onions suitable for keto? How many carbohydrates are in onions?
When used in moderation and cooked correctly, it is keto-friendly and a delicious addition to a keto diet. Let’s take a closer look at the health benefits and carbohydrate content of different types of onions.
Yellow Onions: Approximately 9 grams of net carbs per 100 grams. Red onions: Slightly lower than yellow onions, red or purple onions have about 10 total carbohydrates (per 100 grams) and 7 grams of net carbohydrates per 100 grams. Green onions (Scallions): Green onions are the lowest carbohydrate onion, containing approximately 3.6 grams of net carbohydrates per 100 grams.
This is an updated chart that includes the aforementioned information plus weight in cups and ounces.
It is important to note that cup and ounce weights are approximate conversions and the actual size of onions and shallots may vary, which may affect measurements.
This table provides general reference information to help estimate the net carbs and portion sizes of onions when considering a keto diet. Use the Cups to Ounces or Cups to Tablespoons Conversion Chart to convert cup or tablespoon quantities in recipes.
onion benefits
Onions are a versatile vegetable that is commonly used in many different cuisines around the world. It is low in calories and fat and provides a variety of nutrients and health benefits. Here is a summary of the nutritional content of onions per 100 grams of raw onions.
Calories: Approximately 40kcal Carbohydrates: Approximately 9.3g Dietary fiber: Approximately 1.7g Carbohydrates: Approximately 4.2g Protein: Approximately 1.1g Fat: Negligible amount Vitamins and minerals: Vitamin C: Approximately 7.4mg (12 of the recommended daily intake) %) Vitamin B6 (pyridoxine): approximately 0.12 milligrams (10% of the daily recommended intake) Folic acid (vitamin B9): approximately 19 micrograms (5% of the daily recommended intake) Potassium: approximately 146 milligrams Phosphorus: Approximately 29 mg Magnesium: Approximately 10 mg Calcium: Approximately 23 mg Iron: Approximately 0.2 mg
Onions also contain trace amounts of other vitamins, minerals, and antioxidants that contribute to potential health benefits, such as quercetin, a flavonoid with antioxidant properties. Nutrient content varies slightly depending on factors such as onion type, growing conditions, and cooking method.
Onions contain some nutrients, but the amounts used in cooking are often relatively small, so they may not be a significant source of certain nutrients in the typical diet. It is important to note that However, they can add flavor, texture, and potential health benefits to a variety of dishes.

How to prepare onions
Onions are a versatile and flavorful keto ingredient that can be prepared in a variety of ways to enhance the flavor of many dishes. Here are three common ways to prepare onions.
Sauteed Onions: Sauteed sweet onions are a classic base for many dishes. Adds sweetness and depth to meals. Here’s how to make it: Heat a saucepan over medium heat and add 1 tablespoon of cooking oil (such as olive oil or butter). Slice the onions thinly or dice them, depending on your preference. Add the sliced/diced onions to the pan and sauté, stirring occasionally, until translucent and starting to caramelize, about 10-15 minutes. Add a pinch of salt and pepper to taste, and optionally add herbs and spices for added flavor. Caramelized onions: Caramelized onions take sautéed onions to the next level. It’s sweet and flavorful, making it a great topping for burgers, steaks, sandwiches, and more. Learn how to caramelize onions. Heat a saucepan over medium-low heat and add 1 tablespoon of butter or a mixture of butter and oil. Slice the onion thinly. Add the sliced onions to the pot and cook slowly, stirring occasionally, until deep golden brown, about 30 to 45 minutes. Slow cooking allows the natural sugars in the onions to caramelize, increasing their sweetness. Season with a pinch of salt and enjoy! Roasted Onions: Roasted onions bring out their natural sweetness and make a delicious side dish that pairs well with a variety of main courses. Preheat oven to 400°F (200°C). Peel the onion and cut it into wedges or thick slices. Toss the onion pieces with 1 tablespoon of olive oil, salt, pepper, and your favorite herbs and spices (such as rosemary, thyme, or garlic powder). Spread the seasoned onions in a single layer on the baking sheet. Roast the onions in the preheated oven for 25 to 35 minutes, stirring once or twice during cooking, until softened and slightly caramelized around the edges. Serve roasted onions as a delicious garnish or add them to salads.
These three methods will show you the amazing versatility of onions and how you can use them to enhance the flavor of your favorite dishes. Try these techniques to find the perfect way to incorporate onions into your diet.
Basic rules for vegetables on the keto diet
When it comes to vegetables on a keto diet, not all are created equal. The key is to choose something low-carbohydrate and low-starch that won’t interfere with your body’s ketosis process. Here are some basic rules to keep in mind.
Choose vegetables that are low in starch: Choose vegetables that are low in carbohydrates and high in fiber. Leafy greens like spinach, kale, and lettuce, as well as cruciferous vegetables like broccoli and cauliflower (see our cauliflower recipes) are great options. Watch the carbohydrate content: Pay attention to the carbohydrate content of vegetables. Aim for around 5 grams or less of net carbohydrates per serving. Use high-carbohydrate vegetables in moderation: Some high-carbohydrate vegetables, such as onions, can be consumed in moderation. Just be aware of your portion size.
Are onions keto friendly? Yes, that’s right. It’s absolutely possible to incorporate onions into your keto diet as long as you keep an eye on their carbohydrate content and balance them with other low-carb vegetables. Enjoy the delicious flavor that onions bring to your meals while achieving your ketogenic diet goals.
Low Carb Keto Onion Recipes to Try
If you love onions and want to incorporate them into your keto diet, there are plenty of delicious options. Here are some sensational keto recipe ideas.

Imagine juicy, succulent chicken breast stuffed with a flavorful caramelized onion filling and your favorite cheese mixture. All of these are baked to perfection until crispy and golden on the outside and soft and moist on the inside.
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Learn how to perfectly fry onions in your own kitchen. Soft, slightly sweet and tangy onions are super easy to make and delicious. Try it today!
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