
Eggs, onions, and mushrooms are all nutrient-dense foods that can be cooked in a variety of ways. Eggs are a great source of protein, vitamins, and minerals, with the number of calories depending on the size of the egg and the method of preparation. Mushrooms are a low-calorie, high-fiber option that provides various vitamins and minerals, with one cup of mushrooms containing around 15 calories. Onions are rich in antioxidants and plant compounds, offering health benefits such as improved colon health and reduced blood sugar levels. The calorie count for onions depends on the type and quantity consumed. Combining these three ingredients can create a nutritious and flavorful dish, with the overall calorie count depending on the specific amounts and preparation methods chosen.
| Characteristics | Values |
|---|---|
| Calories in Scrambled Eggs with Mushrooms and Onions | 327 |
| Calories in Onion and Mushroom Omelet | 72 (egg), 34 (egg white), 12 (onion), 11 (mushrooms) |
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What You'll Learn
- Mushrooms are low-calorie, high-fibre, and contain 15 calories per cup
- Eggs are nutrient-dense, containing essential vitamins and minerals
- Calorie count varies depending on the size of the egg
- Cooking methods affect the calorie count of eggs
- Onions are rich in plant compounds, antioxidants, and soluble fibres

Mushrooms are low-calorie, high-fibre, and contain 15 calories per cup
Mushrooms are a great, healthy addition to any meal. They are low in calories, with a cup containing only 15 calories, and are a good source of fibre. This makes them an excellent option for those watching their weight or looking to increase their fibre intake.
A mushroom omelette is a tasty, low-calorie meal option. The calorie count for a whole egg is 72, and a large egg white is 34 calories. If you use two egg whites instead of a second whole egg, you can reduce the calorie count of your omelette. Onions are also relatively low in calories, with 0.20 cup of chopped raw onions containing only 12 calories.
Mushrooms themselves have a very low calorie count, so they are a great option to bulk up a meal without adding many calories. For example, five small fresh mushrooms contain only 11 calories. This means you can add a lot of mushrooms to your omelette without significantly increasing the calorie count.
Scrambled eggs with mushrooms is another delicious meal option. This dish contains approximately 327 calories per serving. While this is more than the mushroom omelette, it is still a good source of protein, potassium, and vitamin A.
Overall, mushrooms are a versatile and healthy food option. With their low-calorie and high-fibre content, they can be a nutritious addition to any meal.
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Eggs are nutrient-dense, containing essential vitamins and minerals
A meal containing mushrooms, onions, and an egg can be prepared in a variety of ways, including as an omelette, scrambled eggs, or baked eggs. The calorie count for such a meal can vary depending on the method of preparation and the specific quantities of each ingredient used. For example, a serving of scrambled eggs with mushrooms has around 327 calories, with a macronutrient breakdown of 17% carbs, 63% fat, and 20% protein. On the other hand, an onion and mushroom omelette made with one large fresh egg, egg whites, raw onions, and fresh mushrooms can have a total calorie count of 129.
The egg yolk, in particular, is a major source of liposoluble vitamins, including vitamins A, D, E, and K. The content of these vitamins in the yolk depends on the hen's diet. For instance, consuming omega-3-enriched eggs can help lower blood triglycerides. Additionally, egg yolks contain large amounts of the antioxidants lutein and zeaxanthin, which accumulate in the retina of the eye and can help reduce the risk of common eye disorders like cataracts and macular degeneration.
While eggs are high in cholesterol, the impact of dietary cholesterol on blood cholesterol levels is still a subject of debate within the scientific community. Some studies suggest that eating one egg daily can increase HDL cholesterol and decrease LDL cholesterol, while others have linked egg consumption to an increased risk of death from heart disease. However, most experimental, clinical, and epidemiologic studies have found no correlation between dietary cholesterol from eggs and an increase in total cholesterol levels. It is recommended that individuals with high cholesterol consult a doctor before including eggs in their daily diet.
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Calorie count varies depending on the size of the egg
The calorie count for a meal of mushrooms, onions, and an egg depends on several factors, including the method of preparation and the size of the egg. For example, a mushroom and onion omelet made with one large fresh, whole, raw egg contains 72 calories from the egg, 34 calories from another large egg white, 12 calories from raw onions, and 11 calories from fresh mushrooms, for a total of 129 calories. However, the same meal made with a different size of egg would have a different calorie count.
A smaller or medium-sized egg would contribute fewer calories to the overall meal, while a larger or extra-large egg would contribute more calories. For example, a medium-sized egg typically has around 65-70 calories, while an extra-large egg can have 80 or more calories. So, if the same mushroom and onion omelet were made with a medium-sized egg, it would have around 10-15 fewer calories, assuming all other ingredients and quantities remained the same.
Similarly, if the omelet called for two medium-sized eggs instead of one large egg, the calorie count from the eggs would be higher, resulting in a higher-calorie meal overall. The way the egg is prepared can also affect the calorie count. For example, scrambled eggs with mushrooms have a higher calorie count of 327 calories per serving, likely due to the addition of oil or butter during cooking.
Additionally, the calorie content of onions and mushrooms can vary depending on their preparation. Raw onions have relatively few calories, but if they are caramelized or cooked down significantly, they will have a higher calorie count due to the reduction in water content and the addition of fats or oils during cooking. Mushrooms also vary in calorie content depending on their type and preparation. Smaller, more delicate mushrooms like button mushrooms have fewer calories, while larger, meatier mushrooms like portobellos can have more calories.
In conclusion, the calorie count of a meal containing mushrooms, onions, and an egg can vary depending on the size of the egg and the method of preparation. Smaller eggs will result in lower-calorie meals, while larger eggs or additional eggs will increase the calorie count. The cooking methods and ingredients used to prepare the mushrooms and onions can also affect the overall calorie content of the dish.
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Cooking methods affect the calorie count of eggs
A large egg contains around 70 to 72 calories. However, the calorie count of an egg can change depending on how it is cooked. For example, scrambled eggs cooked in a microwave with a little salt, pepper, and semi-skimmed milk will provide around 170 calories for two eggs. On the other hand, scrambled eggs cooked in a pan with butter will total between 200 and 245 calories, depending on the amount of butter added.
Cooking methods can indeed affect the calorie count of eggs. Frying an egg in fat will increase the number of calories compared to boiling it. This is because the egg will absorb the fat, increasing the overall calorie count. For example, a fried egg can range from 85 calories if cooked with a little spray oil, to around 120 calories if fried in oil and not drained. Similarly, scrambled eggs cooked with butter or oil will have a higher calorie count than boiled or poached eggs, which are cooked without the addition of fat.
Poached and boiled eggs are considered the lowest-calorie cooking methods for eggs, as they don't add any extra fat or calories. These methods are recommended for those looking to cut back on calories.
It is worth noting that the cooking method can also affect the nutritional content of eggs. While eggs are a great source of vitamins and antioxidants, cooking them can reduce these nutrients. For example, common cooking methods such as microwaving, boiling, and frying can reduce the number of certain antioxidants by 6-18%. Additionally, the longer and hotter the eggs are cooked, the more nutrients may be lost, and the amount of oxidized cholesterol may increase. Therefore, shorter cooking times and lower-heat methods, such as poaching or boiling, are recommended to retain most of the egg's nutrients.
However, it is important to note that the difference in calorie content and nutritional value between a raw and cooked egg is negligible. Additionally, cooking eggs destroy dangerous bacteria, making them safer to eat.
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Onions are rich in plant compounds, antioxidants, and soluble fibres
The calorie count of a meal containing mushrooms, onions, and an egg depends on the quantities of each ingredient used and the method of preparation. For example, a serving of scrambled eggs with mushrooms contains 327 calories, while an onion and mushroom omelet contains 129 calories.
On that note, onions are a rich source of plant compounds, antioxidants, and soluble fibres. They contain sulfur-containing compounds, such as quercetin, which give them their sharp taste and smell. Quercetin has been linked to a range of health benefits, including reduced inflammation, improved immune function, and lower blood pressure. Onions are also a good source of vitamin C, folate, vitamin B6, and potassium.
Red and yellow onions are particularly rich in antioxidants, with yellow onions containing almost 11 times more antioxidants than white onions. These antioxidants have been shown to have anti-inflammatory properties and may help reduce the risk of chronic diseases such as cancer and diabetes. Onions also contain anthocyanins, powerful antioxidants found in red or purple onions that give them their reddish color.
In addition to their antioxidant properties, onions are a good source of soluble fiber, specifically a type called fructans. Fructans are prebiotic fibers that feed the beneficial bacteria in the gut, leading to the formation of short-chain fatty acids (SCFAs) that improve colon health and reduce inflammation. However, some individuals may experience digestive issues when consuming onions due to their FODMAP content, which can cause problems for those with irritable bowel syndrome (IBS).
Overall, onions are a nutrient-dense food that can provide a range of health benefits when included in a balanced diet. They are a good source of plant compounds, antioxidants, and soluble fibers, which contribute to their positive impact on health.
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Frequently asked questions
One large, fresh, whole, raw egg contains 72 calories.
Mushrooms and onions contain 11 and 12 calories respectively.
An omelette with mushrooms and onions contains around 120 calories.
Scrambled eggs with mushrooms contain 327 calories.
Yes, you can make an egg omelette or scrambled eggs with mushrooms and onions, which are relatively low in calories.

























