Are Onions Keto-Friendly?
Can’t imagine your meals without onions? You can enjoy them on keto in measured portions. The amount you use matters more than whether an onion tastes sweet.
For raw onions, 1/2 cup chopped (80g) contains 7.4g total carbs, 1.4g fiber and 6.1g net carbs. These are the serving values in our onion carb guide, based on USDA raw onions.
Use a smaller amount for seasoning if that serving takes up too much of your carb allowance. Caramelizing onions doesn’t require added sugar, and pickled onions aren’t automatically off-limits. Check the recipe or label for added sugar and portion size.
Onions can bring plenty of flavor without being the main ingredient. Measure the portion and count it.
How Many Carbs are in Onions?
Are you wondering how many carbs are in onions while following the keto diet? You’re not alone. Onions, a staple ingredient in many dishes, come in various colors and levels of sweetness.
The amount of net carbs depends on how much you eat. Use the weighed serving above rather than a vague ‘medium onion’, since bulb sizes vary.
Green onions, also called scallions, can be a lower-carb alternative at the same weight. Don’t assume red onions are lower in carbs than yellow or sweet varieties without data for that variety.
Manage the portion within your own daily carb allowance, whichever onion you choose.
You can still enjoy onion recipes that fit keto. Divide the amount of onion in the recipe by the number of portions you actually serve.
Types of Onions (and How Many Carbs They Have)
As someone who follows a keto diet, monitoring the carb content of the foods I eat is crucial. Onion, with its distinct taste and flexible use in the kitchen, requires careful consideration when it comes to carb count.
For a like-for-like comparison, use raw vegetables per 100g: onions have 7.6g net carbs, green onions have 4.7g, and garlic has 31g. Don’t rank red, yellow or sweet onions by taste alone; use data for the actual variety if you want to compare them.
I always make sure to choose the best onion variety that aligns with my daily macros while still providing delicious seasoning and flexibility to my meals. For those who are uncertain or closely monitoring their intake, measuring and weighing portions precisely is important!
Pickled Onions and Onion Rings on Keto
I know how much everyone loves pickled onions and onion rings, but can we still have them on a keto diet?
Pickled onions can fit if the portion and recipe fit your carb allowance. Sweetened pickles and breaded onion rings need a separate check: added sugar and batter change the dish, and there’s no single carb count for every recipe or restaurant serving.
For a tangy crunch, try sliced onions with vinegar and salt without adding sugar. For a baked version of onion rings, an almond- or coconut-flour coating is an option, but count the onion and coating rather than assuming the finished dish is carb-free.
Keep portions modest and check recipes before treating either pickled onions or onion rings as keto-friendly. There are also other food options if you’d rather spend your carbs elsewhere.
Nutritional Value and Benefits of Onions
Onions provide fiber as well as flavor. Use the total, fiber and net-carb values above when planning a portion; the fiber has already been accounted for in the net-carb figure.
Alternatives to Onions on the Keto Diet
Garlic and shallots can replace some onion flavor, but they aren’t automatically lower in carbs by weight. Garlic is useful in small amounts because its flavor is strong. Don’t assume shallots save carbs without checking the amount and a matching nutrition entry.
Another option worth considering is scallions or green onions. These mild-flavored veggies have fewer carbs than their regular onion counterparts and pair particularly well with Asian-inspired dishes such as stir-fries due to their subtle taste.
Celery, fennel bulbs, radishes and leeks bring different flavors and textures to a recipe. Check their own portions and carb counts before making a substitution.
If your recipe calls for caramelized onions, cook a measured portion without added sugar and account for the amount you eat. Caramel extract doesn’t reproduce the onion’s savory flavor or texture.
Onion can fit keto when its carbs fit your daily allowance. You don’t need to avoid it altogether, but a garnish and a bowlful aren’t the same portion.
Garlic and Shallots as Onion Alternatives
Garlic and shallots can add depth to food, but don’t treat them as carb-free replacements for onions. A strongly flavored ingredient may work in a smaller amount; that doesn’t make it lower in carbs at equal weight.
Garlic, shallots and onions belong to the Allium family and bring different flavors to a dish. Choose them for the recipe, then account for the amount you use.
Simple substitution techniques allow you to use garlic or shallots alternatively as onion replacements while cooking up recipes. Chopped finely and sautéed thoroughly like onions would be a great start! If anything, you might even notice garlic or shallots overpowering the taste of onions when combined with other flavors.
Green onions are a lower-carb option at equal weight. Garlic and shallots bring a different strength of flavor, so adjust the recipe and count the amount you actually use.
Conclusion
Onions can fit keto in moderation. Use the raw onion serving above as your reference, measure what goes into the dish and divide it among your portions. Green onions offer a lower-carb option at equal weight; garlic and shallots aren’t automatic carb savings.