
A cheese and onion toastie is a delicious, comforting meal, but how many calories does it contain? The answer depends on the ingredients used and the quantities. A cheese toastie made with two slices of white bread, two slices of cheddar, butter, and mayo can contain around 550 calories. However, if you use wholemeal bread, cheddar cheese, Worcestershire sauce, and low-fat spread, the calorie count per serving is around 372.
| Characteristics | Values |
|---|---|
| Calories | 372 kcal or 550 kcal or 668 kcal |
| Carbohydrates | 25.4g |
| Protein | 23g |
| Fat | 52.9g |
| Saturated Fat | 25.3g |
| Cholesterol | 123mg |
| Sodium | 938mg |
| Potassium | 137mg |
| Fiber | 2.4g |
| Sugar | 2.6g |
| Calcium | 603mg |
| Iron | 1mg |
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What You'll Learn

Calories in bread: 140-220
The calorie count of bread varies depending on the type of bread and its ingredients. For example, a flimsy white bread slice may contain around 65 calories, while a heartier variety like Panera bread can have up to 160 calories per slice. This difference in calorie count is influenced by factors such as the presence of sugar, butter, and fat in the bread. Additionally, the serving size also plays a role in the overall calorie intake, with two slices of bread contributing significantly more calories than a single slice.
When creating a cheese and onion toastie, the type of bread chosen will have a notable impact on the overall calorie count of the dish. For instance, selecting a flimsy white bread slice as the base will result in a lower calorie count compared to using Panera bread. However, it's important to remember that the additional ingredients, such as cheese, onion, and any condiments, will also contribute to the total calorie intake.
To provide a more comprehensive understanding, let's consider an example of a cheese and onion toastie. In this scenario, we'll use two slices of flimsy white bread, each with 65 calories, totaling 130 calories for the bread. We'll add shredded cheddar cheese, contributing approximately 200 calories (assuming 100 calories per slice), and a thin layer of mayonnaise, which adds another 60 calories. This brings the estimated total calorie count for the toastie to around 400 calories.
However, it's important to note that the calorie count can vary depending on the specific ingredients and their quantities. For instance, using a different type of cheese or adding butter to the bread could increase the calorie count significantly. Additionally, the cooking method and any additional toppings or fillings may also influence the overall calorie intake of the dish.
Bread is a staple food that comes in various forms, and its calorie content can vary significantly. When considering calorie intake, it's essential to pay attention to portion sizes and the nutritional information provided by the bakery or manufacturer. Making informed choices, such as opting for whole grain or whole wheat varieties, can help ensure a healthier bread option that aligns with nutritional goals.
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Calories in cheese: 60-220
The calorie count of a cheese and onion toastie depends on the ingredients used and their quantities. A single slice of cheddar cheese can contain anywhere between 60 and 110 calories. When calculating the calorie count of a cheese and onion toastie, one must also consider the calories in the bread, butter or oil, and other ingredients.
For example, a cheese and onion toastie made with two slices of flimsy white bread (65 calories each) and two slices of cheddar cheese (110 calories each) would contain at least 350 calories. If mayonnaise is added, the calorie count can increase by about 100 calories.
A cheese and onion toastie recipe on DangThat's Sweet includes buttered bread, caramelized onions, and Gruyere cheese. This toastie is estimated to contain 668 calories per serving, with two servings per recipe.
Another recipe for a cheese and onion toastie from SparkRecipes uses Kingsmill Wholemeal Bread, Cheddar Cheese, Flora Light, Worcestershire Sauce, and raw onions. This recipe yields 372 calories per serving.
The calorie count of a cheese and onion toastie can vary depending on the ingredients and their quantities. It is important to consider the nutritional value of each ingredient and adjust the quantities to align with your dietary needs and preferences.
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Calories in butter: ~100
A cheese and onion toastie is a delicious, comforting meal, but it's important to be mindful of the calorie content. While the calorie count can vary depending on the ingredients and portion sizes, a single toastie can contain around 668 calories. This calorie count may be higher or lower depending on the type of bread, cheese, and butter used, as well as any additional ingredients such as mayo or bacon.
Now, let's focus on the calories in butter, which is a key ingredient in a cheese and onion toastie. Butter is a dairy product made from milk or cream, with a rich flavour and creamy texture. It is a fixture in many kitchens and is used as a spread and in cooking and baking. Butter is known for its versatility and ability to enhance the flavour of dishes.
When it comes to calories, a tablespoon (14 grams) of traditional butter contains around 100 to 102 calories. This amount of butter also provides about 11.5 grams of fat, with 7 grams coming from saturated fat. While butter can be part of a balanced diet in small amounts, it is calorie-dense, and excessive consumption can lead to weight gain and health issues, especially when paired with other high-calorie foods.
To put the calorie count into perspective, one tablespoon of butter contains a similar number of calories to a medium-sized banana. Additionally, it contributes a significant portion of the recommended daily intake of saturated fat, which is why moderation is essential. When cooking or preparing dishes, it's important to be mindful of the amount of butter used, as it can quickly increase the overall calorie count of a meal.
In summary, while butter adds flavour and richness to dishes like cheese and onion toasties, it's important to be aware of its calorie content. A single tablespoon contains around 100 to 102 calories, so using multiple tablespoons in a recipe or spreading it generously on bread can significantly impact the overall calorie count. For those watching their calorie intake, there are alternative spreads and cooking oils available that can help reduce calorie intake without sacrificing flavour.
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Calories in caramelised onions: ~8
A cheese and onion toastie is a delicious, comforting meal, but it's important to be aware of the calorie content. While the total number of calories in a cheese and onion toastie will vary depending on the specific ingredients and quantities used, we can estimate the contribution of caramelised onions to be around 8 calories.
Caramelised onions are a key ingredient in a cheese and onion toastie, adding a depth of flavour and a touch of sweetness. To prepare them, thinly sliced onions are slowly cooked until they are tender and golden brown. This process brings out their natural sugars, resulting in a deliciously sweet and slightly charred flavour.
Onions themselves are relatively low in calories. A 20-gram serving of raw onions contains approximately 8 calories, according to one source. When caramelised, the onions may take on a slightly higher calorie count due to the addition of cooking oils or butter, but this increase is likely to be minimal.
In a cheese and onion toastie, the onions are paired with a variety of cheeses, such as Gruyere, Cheddar, or Swiss cheese. These cheeses contribute a more significant amount of calories to the dish. For example, a single slice of Cheddar cheese can contain around 60 to 110 calories. When combined with the calories from bread, butter, and any additional toppings or spreads, the total calorie count of a cheese and onion toastie can range from 300 to 668 calories or more.
Therefore, while the caramelised onions in a cheese and onion toastie may only contribute around 8 calories, the overall calorie content of the dish can be quite high depending on the other ingredients used. It's important to consider the nutritional value of all the ingredients to make an informed decision about your food choices.
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Calories in mayo: 60-100
A cheese and onion toastie is a delicious, comforting meal. This tasty sandwich is made by filling bread with caramelized onions and cheese, then frying it until golden and melty. But how many calories are in this indulgent treat?
The calorie count of a cheese and onion toastie will depend on the specific ingredients and quantities used. For example, the type of bread, cheese, and butter can all vary, and the addition of mayo will also increase the calorie count.
Let's consider the contribution of mayo to the overall calorie count. Mayo typically contains 60-100 calories per serving. For example, one source suggests that a packet of mayo contains 100 calories. Another source states that a serving of mayo is typically around 60 calories.
Assuming the other ingredients are relatively consistent, the addition of mayo can increase the calorie count of a cheese and onion toastie by 60-100 calories. This is a significant contribution and is important to consider when calculating the overall calorie count of the dish.
So, if you're watching your calorie intake, it's worth keeping in mind that the addition of mayo to your cheese and onion toastie can add a substantial number of calories. Enjoy your toastie, but be mindful of the ingredients and their contributions to the overall calorie count!
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Frequently asked questions
The number of calories in a cheese and onion toastie can vary depending on the ingredients and portion size. One recipe estimates the calorie count to be 668 per serving. Another estimates 372 calories, but this depends on the type of bread, cheese, and other ingredients used.
The type of bread, cheese, and additional ingredients used can significantly impact the calorie count. For example, a flimsy white bread slice may have around 65 calories, while a thicker slice of bread could have upwards of 140 calories. Similarly, the amount and type of cheese can vary, with cheddar having around 110 calories per slice, and other cheeses varying in calorie content.
You can estimate the calories in your toastie by considering the individual ingredients and their quantities. Start by looking up the calorie content of each ingredient, then multiply it by the amount used in your toastie. Sum up the calories from all the ingredients to get an estimate of the total calories in your toastie.
The cooking method can also affect the calorie count. For example, a grilled cheese toastie may have fewer calories than one cooked with butter, as the butter adds extra calories. Additionally, the cooking method can affect the absorption of oils and other ingredients, which can impact the overall calorie content.

























