Mozzarella is a mild, Italian cheese beloved for its creamy texture and meltability, making it a staple in dishes from pizza to caprese salad. While it offers valuable nutrients like protein and calcium, its caloric value depends on several key factors. The primary variations affecting calories are the milk fat content and moisture level, which is why a 'large slice' can have a different impact on your diet depending on the product.
Understanding 'Large Slice' and Caloric Variation
The term "large slice" is not standardized and can refer to anything from a slightly thicker-than-average pre-packaged slice to a generous, hand-cut portion from a block. Nutritional information is typically based on a 1-ounce (about 28 gram) serving. A slice weighing more than 1 ounce will have a proportionally higher calorie count. Weighing your cheese with a food scale is the most accurate method for tracking calories in an unstandardized portion. For example, if a 1-ounce slice is 85 calories, a 2-ounce slice would be approximately 170 calories.
The main factors influencing the calorie density of mozzarella are:
- Milk Fat Content: Whole milk mozzarella, made from full-fat milk, contains more calories than part-skim mozzarella, which is made from milk with a reduced fat percentage.
- Moisture Content: Fresh mozzarella, which is high in moisture and stored in liquid, is generally lower in calories per ounce than low-moisture mozzarella, which has a higher concentration of fat and protein.
- Aging Process: While mozzarella is a fresh cheese, slight variations in processing can affect its composition. Aged or low-moisture versions will be more calorie-dense than their fresher counterparts.
Whole Milk vs. Part-Skim Mozzarella
As mozzarella is made from milk, the fat content of that milk directly influences the final calorie count. Whole milk mozzarella, favored for its richness and flavor, contains more fat and, therefore, more calories. A single 1-ounce slice typically contains around 85-90 calories. In contrast, part-skim mozzarella is a lighter option. A 1-ounce slice usually ranges from 70 to 85 calories, offering a similar flavor profile with fewer calories and less saturated fat.
Average Calorie Breakdown for Mozzarella
To help visualize the difference, here is a comparison of the average calories and macronutrients for a 1-ounce (28g) serving of different mozzarella types.
| Type of Mozzarella | Approximate Calories (kcal) | Total Fat (g) | Saturated Fat (g) | Protein (g) | 
|---|---|---|---|---|
| Whole Milk | 85-90 | 6-7 | ~4 | ~6 | 
| Part-Skim | 70-85 | 4.5-5.7 | ~3.6 | 7-9 | 
| Fresh (High Moisture) | 70-80 | 5-6 | ~4 | 5-6 | 
These figures demonstrate why checking the specific product label is crucial for accurate calorie counting. A "large slice" of whole milk mozzarella will invariably contain more calories than a large slice of part-skim mozzarella of the same weight.
Tips for Including Mozzarella in a Balanced Diet
If you're watching your calorie intake, you don't have to give up mozzarella entirely. Smart strategies can help you enjoy this delicious cheese without derailing your diet.
- Opt for Part-Skim: Choosing part-skim mozzarella is a simple way to reduce both calories and saturated fat without sacrificing taste.
- Measure Portions: Use a food scale or measuring spoons (for shredded cheese) to ensure you're sticking to a moderate serving size, such as 1 or 1.5 ounces.
- Combine with Vegetables: Pairing mozzarella with fresh, low-calorie vegetables like tomatoes, basil, and leafy greens in a caprese salad is a great way to create a filling, nutritious meal.
- Use as a Topping: Instead of making cheese the main event, use it as a flavorful topping. A sprinkle of mozzarella can add a rich taste to roasted vegetables or lean protein.
- Consider Fresh Mozzarella: Fresh, high-moisture mozzarella often has fewer calories and sodium compared to its low-moisture counterpart, making it a great choice for salads and sandwiches.
How Mozzarella Compares to Other Cheeses
Mozzarella is often considered a healthier cheese option when compared to hard, aged cheeses like cheddar due to its lower calorie and fat content. However, it is more calorie-dense than some other fresh cheeses like cottage cheese.
| Cheese Type | Approximate Calories per 1 oz (28g) | 
|---|---|
| Mozzarella (Whole Milk) | ~85 | 
| Mozzarella (Part-Skim) | ~75 | 
| Provolone | ~98 | 
| Cheddar | ~114 | 
| Swiss | ~106 | 
| Feta | ~75 | 
These comparisons highlight mozzarella's relative lightness, especially the part-skim variety, making it a smart choice for those mindful of their caloric intake.
Conclusion
To determine how many calories are in a large slice of mozzarella, you must first define "large." A standard 1-ounce slice contains roughly 85-90 calories for the whole milk version and 70-85 calories for part-skim. A larger slice, perhaps 1.5 to 2 ounces, would increase the calories accordingly. For example, a 2-ounce slice of whole milk mozzarella could contain around 170-180 calories. The fat content of the milk is the primary factor influencing the calorie density, with whole milk options containing more than part-skim. Ultimately, mindful portion control and choosing part-skim varieties can help you enjoy mozzarella as part of a balanced and healthy diet. EatingWell provides a dietitian's perspective on the health benefits of mozzarella.