Mozzarella is a moderate-fat cheese. A one-ounce serving of whole milk mozzarella contains about 6 to 7 grams of fat, which places it well below higher-fat options like cheddar (9 grams) and brie (8 grams). It’s not a low-fat food by any standard, but among cheeses, it sits on the leaner end of the spectrum.
Fat Content by Type of Mozzarella
Not all mozzarella is created equal. The fat content shifts depending on whether you’re buying fresh mozzarella, low-moisture mozzarella, or part-skim varieties, and the differences are worth knowing if you’re watching your intake.
Whole milk, low-moisture mozzarella (the kind you’d typically find shredded in bags for pizza) contains about 7 grams of total fat per ounce, with roughly 4.4 grams of that being saturated fat. Part-skim mozzarella drops slightly to around 5.7 grams of total fat and 3.6 grams of saturated fat per ounce, saving you about a gram of fat per serving.
Fresh mozzarella, the soft white balls packed in water, has a higher moisture content (52 to 60 percent water, compared to 45 to 52 percent for low-moisture varieties). That extra water dilutes the fat concentration by weight, so ounce for ounce, fresh mozzarella tends to be slightly lower in fat than the firmer, low-moisture type. The tradeoff is that people often use larger portions of fresh mozzarella, slicing thick rounds for caprese salads or layering it generously in dishes, which can offset that advantage.
How Mozzarella Compares to Other Cheeses
Context matters more than the raw number. Here’s how mozzarella stacks up against other popular cheeses per one-ounce serving, based on USDA data compiled by Penn State Extension:
- Cheddar: 9 grams of fat
- Brie: 8 grams of fat
- Whole milk mozzarella: 6 grams of fat
- Part-skim mozzarella: 6 grams of fat
Mozzarella has roughly a third less fat than cheddar. If you’re swapping mozzarella for cheddar on a sandwich or in a recipe, you’re cutting 2 to 3 grams of fat per ounce, which adds up when a recipe calls for several ounces. Among widely available cheeses, only options like cottage cheese and certain goat cheeses consistently come in lower.
The Saturated Fat Question
Total fat is only part of the picture. Most of the fat in mozzarella is saturated, the type linked to raised cholesterol levels. In whole milk mozzarella, roughly 60 to 65 percent of the total fat is saturated. That means a single ounce delivers about 3.7 to 4.4 grams of saturated fat.
The American Heart Association recommends keeping saturated fat below 6 percent of your total daily calories. On a 2,000-calorie diet, that works out to about 13 grams per day. One ounce of whole milk mozzarella uses up roughly a quarter to a third of that budget. Two ounces, a common amount on a pizza slice or in a pasta dish, takes you to about half your daily limit before you’ve accounted for anything else you’ve eaten.
Part-skim mozzarella improves this slightly, dropping the saturated fat to around 3.6 grams per ounce. It’s a meaningful reduction if you eat cheese regularly, though it won’t transform mozzarella into a heart-healthy food on its own.
Where Mozzarella Fits in Your Diet
Mozzarella’s reputation as a “lighter” cheese is relative, not absolute. At about 85 calories and 5 to 7 grams of fat per ounce, it’s a reasonable choice when you want cheese without the heavier caloric load of aged varieties. It also provides a decent amount of protein and calcium per serving, making it more nutritionally balanced than ultra-rich cheeses like cream cheese or mascarpone.
Portion size is where most people run into trouble. A single ounce of mozzarella is roughly the size of your thumb or one thin slice. A typical serving of shredded mozzarella on homemade pizza, a generous caprese, or a bowl of baked pasta can easily reach 3 to 4 ounces, bringing the fat content to 18 to 28 grams. At that point, even a “moderate-fat” cheese contributes a substantial share of your daily fat intake.
If you’re choosing between cheeses and fat content matters to you, mozzarella is one of the better mainstream options. Opting for part-skim over whole milk saves a small but consistent amount of fat and calories. The bigger lever, though, is how much you use. Measuring your cheese rather than eyeballing it makes a larger practical difference than switching between mozzarella varieties.