How many carbs are in a mushroom omelette? A comprehensive nutritional guide

December 16, 2025 •

3 min read

A standard 2-egg mushroom omelette can contain as little as 4.6 grams of total carbohydrates, making it a naturally low-carb and protein-rich meal. However, the specific number of carbs in a mushroom omelette depends heavily on the recipe, particularly the addition of milk, cheese, or other vegetables.

Quick Summary

The carbohydrate content of a mushroom omelette varies with ingredients, preparation, and serving size. Key factors influencing the carb count include added milk, cheese, and vegetables. Despite variations, the dish is typically low in carbs, making it an excellent choice for many dietary plans.

Key Points

Low-Carb Base: A basic mushroom omelette with just eggs and mushrooms is naturally very low in carbohydrates, typically containing less than 5 grams.
Ingredient Impact: The final carb count is most influenced by added ingredients such as milk, higher-carb vegetables like onions, and even certain cheeses.
Keto-Friendly Option: By substituting milk with heavy cream and selecting low-carb fillings, a mushroom omelette can easily be adapted for a strict ketogenic diet.
Serving Matters: The most significant potential for added carbs comes from how the omelette is served, such as with toast, hash browns, or starchy side dishes.
High-Protein Meal: Beyond its low-carb profile, a mushroom omelette is a high-protein dish that helps with satiety and provides essential nutrients like B vitamins and selenium.

The Basic Mushroom Omelette Carb Count

The fundamental components of a mushroom omelette—eggs and mushrooms—are both naturally low in carbohydrates. Eggs contain a negligible amount, roughly 0.6 grams per large egg, while mushrooms contribute a minimal carb load, approximately 2.3 grams of net carbs per 100 grams. A simple omelette made with just two or three eggs, sautéed mushrooms, and a little butter will yield a very low total carbohydrate count, often under 5 grams. This makes it an ideal option for those following low-carb, keto, or diabetic-friendly diets.

The Impact of Ingredient Choices

While the base is low-carb, additional ingredients can significantly alter the final nutritional profile. Here is a breakdown of how common additions affect the total carbs:

Milk or Cream: Adding milk to achieve a fluffier texture introduces lactose, a type of sugar. The amount of carbohydrates depends on the volume and type of milk used. Heavy cream, a staple in many keto recipes, has a very low carbohydrate count compared to milk.
Cheese: Different cheeses vary in their carbohydrate content. While most hard and soft cheeses are low in carbs, they can still add a small amount. For example, 30g of mature cheddar adds approximately 4g of sugar according to one source. The overall impact is usually minor, but it is a factor to consider for strict diets.
Vegetables: While mushrooms are low-carb, other vegetables, such as onions, bell peppers, or spinach, add to the total count. Onions, for example, have more carbs per serving than mushrooms.
Serving Style: The way you serve the omelette is crucial. Adding a side of toast, hash browns, or ketchup can quickly turn a low-carb meal into a high-carb one. To keep it low-carb, serve with a simple salad or sliced avocado.

Comparison of Mushroom Omelette Recipe Variations


Omelette Type	Eggs	Fillings	Cheese	Added Liquid	Estimated Total Carbs
Basic	2	70g mushrooms	No	No	~5g
Keto	3	70g mushrooms	1 oz Swiss	1 tbsp heavy cream	~4g
Cheesy	2	22g mushrooms	0.3 oz Swiss	No	~2.3g
Indian Style	2	Mushrooms, onions, spices	No	No	~19g (contains fiber)

Making Your Mushroom Omelette as Low-Carb as Possible

For those who need to strictly monitor their carb intake, a few simple adjustments can help. Start by focusing on the core ingredients: high-quality eggs and your choice of fresh mushrooms. When sautéing, use healthy fats like butter or olive oil. If you prefer a richer, creamier texture, opt for heavy cream over milk, as it has a lower carb content and adds fat for satiety. For fillings, stick to naturally low-carb vegetables and herbs. Consider adding low-carb cheeses like feta, mozzarella, or cheddar, but track the amounts. To avoid any unnecessary sugars, check the labels of any pre-packaged seasonings or sauces. By controlling these variables, you can ensure your mushroom omelette aligns perfectly with your dietary needs.

The Health Benefits Beyond Carbs

A mushroom omelette is not just a low-carb option; it is a nutritional powerhouse. Eggs provide a complete protein profile, with all nine essential amino acids, and are a source of choline, important for brain health. Mushrooms are an excellent source of selenium, B vitamins like riboflavin and niacin, and have anti-inflammatory and immune-boosting properties. This combination delivers a filling, nutrient-dense meal that can help manage blood sugar levels and keep you full for longer, preventing unnecessary snacking. Healthline provides further insights into the benefits of mushrooms for those with diabetes.

Conclusion

In summary, the number of carbs in a mushroom omelette is low, but not a fixed figure. The total count is determined by the specific ingredients and proportions used in the recipe. A basic omelette with just eggs and mushrooms will have minimal carbs, making it an excellent choice for low-carb and keto diets. While adding ingredients like cheese, milk, or other vegetables can increase the carb count, it often remains a healthy, low-carb meal. By being mindful of your additions and recipe variations, you can easily control the carbohydrate content and enjoy this versatile and nutritious meal at any time of day.

Frequently Asked Questions

No, mushrooms are very low in carbohydrates, containing only about 2.3 grams of net carbs per 100 grams, making them an excellent low-carb ingredient.

Adding cheese only minimally increases the carbohydrate count. Most cheeses are low in carbs, and the omelette will remain a low-carb meal unless an excessively large amount is used.

Yes, a mushroom omelette is a staple of the ketogenic diet. To keep it strictly keto, use heavy cream instead of milk and avoid higher-carb fillings.

To calculate net carbs, you subtract the grams of dietary fiber from the total carbohydrates. Since eggs and mushrooms have very little fiber, the net carb count is extremely low for a simple mushroom omelette.

Heavy cream has a significantly lower carbohydrate count than milk, making it a better option for those monitoring their carbs. Milk contains lactose, a type of sugar, that adds more carbs to the total.

Yes, you can add other low-carb vegetables like spinach, bell peppers, or herbs. However, be mindful of portion sizes, as some vegetables can increase the total carbohydrate count more than others.

To maintain a low-carb profile, serve your omelette with sides like a simple green salad, sliced avocado, or low-carb salsa instead of toast or potatoes.