Cheese is a solid source of protein, though the amount varies dramatically depending on which type you choose. A single ounce of most common cheeses delivers 6 to 10 grams of protein, while cottage cheese stands out with roughly 14 grams per ounce. That means a half-cup serving of cottage cheese can rival the protein in a small chicken breast.
How Much Protein Different Cheeses Contain
Not all cheeses are created equal when it comes to protein. Hard, aged cheeses tend to pack more protein per ounce because the aging process removes moisture, concentrating the nutrients. Here’s how popular varieties compare in a single one-ounce serving, based on data from Penn State Extension:
- Cottage cheese (1% milkfat): 14 g protein
- Parmesan: 10 g protein
- Mozzarella (skim milk): 7 g protein
- Cheddar: 6 g protein
- Mozzarella (whole milk): 6 g protein
- Brie: 6 g protein
Parmesan’s high number makes sense when you consider how dry and dense it is. A one-ounce chunk of Parmesan is surprisingly small, yet it delivers nearly as much protein as a full egg. Cottage cheese tops the list because it’s essentially fresh curds with minimal fat, so protein makes up a large share of its calories.
Soft, creamy cheeses like Brie and Camembert sit at the lower end. They contain more moisture and fat relative to protein. Cream cheese is even lower, offering only about 2 grams per ounce, making it a poor choice if protein is your goal.
Why Cheese Protein Is High Quality
The protein in cheese isn’t just abundant. It’s also highly usable by your body. Dairy protein scores among the highest of any food on the PDCAAS scale, a standard measure of protein quality that accounts for both amino acid content and how well your body can digest it. Cow’s milk protein earns a PDCAAS of 121 (before truncation to the maximum score of 100), compared to 92 for beef and 91 for soy. Since cheese is concentrated milk protein, it inherits that quality.
Cheese is also rich in leucine, an amino acid that plays a key role in triggering muscle repair and growth. Swiss cheese leads the pack among cheeses, with about 3.9 grams of leucine per cup (diced). Provolone, cheddar, and Parmesan all deliver between 2.5 and 3 grams per cup. This makes cheese a legitimate protein source for people focused on maintaining or building muscle, not just a flavor addition to meals.
Cheese Protein Digests Slowly
Most of the protein in cheese is casein, which behaves differently in your body than the whey protein found in protein shakes. When casein hits your stomach, digestive enzymes cause it to form a thick curd. This is actually the same process that creates cheese in the first place. That curd breaks down gradually, releasing amino acids into your bloodstream over several hours rather than all at once.
This slow release has practical benefits. It keeps you feeling full longer, which is one reason cheese can be a satisfying snack even in small portions. Research comparing cottage cheese to eggs found that both foods had similar effects on appetite and fullness, despite the fact that their proteins digest at very different speeds. In that study, 20 to 30 grams of protein from either source was enough to meaningfully reduce hunger, regardless of whether the protein was fast or slow digesting.
The slow digestion also means cheese provides a steady stream of amino acids to your muscles. This makes it a popular nighttime snack among athletes. A serving of cottage cheese before bed can supply amino acids throughout the night when your body is doing most of its repair work.
The Best Cheeses for Protein Per Calorie
If you’re trying to get protein without excess calories, your choice of cheese matters a lot. Full-fat cheeses like cheddar and Brie deliver protein alongside significant amounts of fat, which drives up the calorie count. You’re getting 6 grams of protein per ounce, but you’re also getting 9 or more grams of fat along with it.
The most efficient options are low-fat cottage cheese and part-skim mozzarella. Cottage cheese with 1% milkfat gives you 14 grams of protein per ounce with very little fat. Part-skim mozzarella offers 7 grams per ounce with roughly half the fat of cheddar. Parmesan is a solid middle ground: it’s calorie-dense by weight, but you typically use it in small amounts (a tablespoon or two grated over a dish), and its intense flavor means a little goes a long way.
Full-fat cheeses aren’t “bad” choices. They’re just less protein-efficient. If you’re eating cheese for enjoyment and general nutrition, a slice of cheddar or a wedge of Brie provides perfectly good protein alongside fat, calcium, and other nutrients. But if you’re specifically trying to hit a protein target while managing calories, cottage cheese and part-skim varieties are your best bet.
How Cheese Compares to Other Protein Sources
To put cheese in perspective: a 3-ounce serving of cooked chicken breast has about 26 grams of protein. You’d need roughly 4 ounces of cheddar to match that, which would also give you around 450 calories and 36 grams of fat. With cottage cheese, you’d need less than 2 ounces for a comparable amount, at a fraction of the calories.
Cheese works best as a protein contributor rather than your primary source. Adding an ounce of Parmesan to a salad instantly boosts the protein by 10 grams. Melting part-skim mozzarella on a wrap adds 7 grams. A cup of cottage cheese with fruit gives you a snack with 25 to 28 grams of protein, which is genuinely competitive with a serving of meat or a protein shake.
For people who don’t eat meat, cheese can fill an important gap. Combining it with beans, lentils, or whole grains throughout the day easily covers all essential amino acid needs, and because dairy protein is already complete on its own, cheese doesn’t even require combining at the same meal.