Cashews deliver fat, protein, and minerals in a form your body absorbs easily

Cashews are calorie-dense nuts packed with unsaturated fat, plant protein, and minerals like copper, magnesium, and zinc. A one-ounce serving (about 23 nuts) contains roughly 155 calories, 12 grams of fat, 5 grams of carbohydrate, and 5 grams of protein. Unlike some nuts, cashews are lower in fiber but higher in carbs, which matters if you're tracking either. The fat in cashews is mostly oleic acid—the same heart-healthy fat found in olive oil—plus smaller amounts of linoleic acid, a polyunsaturated fat your body needs but cannot make on its own.

The mineral profile is what sets cashews apart. A single ounce delivers about 82% of your daily copper need, 20% of your magnesium, and 15% of your zinc. Copper supports bone strength and helps your body absorb iron. Magnesium regulates muscle and nerve function. Zinc supports immune response and wound healing. These minerals work together rather than in isolation, which is why eating the whole nut matters more than isolating one nutrient.

Key Takeaways

  • Cashews are high in unsaturated fat and contain meaningful amounts of copper, magnesium, and zinc in a single serving.
  • Raw cashews must be heat-treated to remove toxic oils from the shell, so truly raw cashews do not exist in retail form.
  • Roasted and salted cashews are shelf-stable for months if kept in an airtight container away from heat and light.
  • Cashew butter and cashew milk offer different nutrient profiles than whole nuts and work better for certain uses like smoothies or cooking.
  • Portion control matters because cashews are calorie-dense; one ounce is a realistic serving size, not a handful.

How cashew processing affects what you're eating

All cashews sold in stores have been heat-treated. The cashew seed grows inside a shell that contains toxic oils called cardol and anacardic acid. These oils must be removed through roasting or steaming before the nut is safe to eat. Marketing sometimes uses the word "raw" to mean "not roasted after shelling," but this is misleading—the nut has still been processed to remove the shell and its toxins. True raw cashews with the shell intact are not sold in North America.

Roasted cashews are heated to higher temperatures, which darkens them and develops a deeper flavor. This process also reduces the vitamin E content slightly but does not significantly change the mineral content. Salted roasted cashews have added sodium, typically 170 to 200 mg per ounce, which is about 7% to 9% of the daily limit. Unsalted roasted cashews contain only the trace sodium naturally present in the nut. Both are shelf-stable for three to six months in an airtight container at room temperature, away from direct sunlight and heat sources like the stove.

Cashew butter and cashew milk: when to use each

Cashew butter is ground roasted cashews, sometimes with added oil or salt. It contains all the fat and minerals of whole cashews but in a more concentrated form per tablespoon. Two tablespoons of cashew butter (about 32 grams) deliver roughly 190 calories, 16 grams of fat, and 7 grams of protein. Cashew butter works well stirred into oatmeal, spread on toast, or mixed into sauces. It separates over time because cashews contain less oil than peanuts or almonds, so stir before using or store upside down to distribute the oil. Opened jars last about two weeks at room temperature or two months refrigerated.

Cashew milk is made by blending soaked cashews with water and straining out the solids. It contains far fewer calories and minerals than whole cashews or cashew butter because most of the nut is removed. A cup of unsweetened cashew milk typically has 25 to 40 calories, less than 1 gram of protein, and minimal minerals unless fortified. Cashew milk is useful as a dairy alternative in coffee or cereal, but it should not be your primary source of cashew nutrition. Check the label for added sugars—many brands add 1 to 2 grams per cup. Unopened shelf-stable cashew milk lasts until the printed date; refrigerated versions last about 10 days after opening.

Practical ways to add cashews to your meals

The simplest approach is to eat a one-ounce portion as a snack—roughly 23 whole nuts. Measure this once with a kitchen scale so you know what it looks like in your hand, then you can estimate future portions. Pair cashews with fruit or vegetables to add fiber and slow digestion, which keeps you satisfied longer. A small apple with 1 ounce of cashews, for example, gives you sustained energy without a blood sugar spike.

In cooking, cashews work best in dishes where their mild, slightly sweet flavor complements other ingredients. Blend soaked cashews into creamy sauces for pasta or vegetables—soak them in hot water for 15 minutes, drain, then blend with garlic, lemon juice, and a little water until smooth. Chop roasted cashews and sprinkle over stir-fries, grain bowls, or salads in the last minute of cooking so they stay crisp. Toast raw cashews in a dry skillet over medium heat for 3 to 5 minutes, shaking often, to deepen their flavor before adding to a dish. Avoid prolonged cooking at high heat, which can damage the unsaturated fats.

Storage and shelf life at home

Whole roasted cashews keep longest in an airtight container at room temperature, away from direct sunlight and heat. A pantry shelf works better than above the stove. Under these conditions, they stay fresh for three to six months. Refrigeration extends this to eight to twelve months. Freezing in an airtight container or freezer bag preserves them for up to two years, though thawing can introduce condensation if not done carefully—thaw in the refrigerator overnight rather than at room temperature.

Cashew butter and cashew milk have shorter windows. Opened cashew butter lasts two weeks at room temperature or two months refrigerated; freezing extends it to six months. Refrigerated cashew milk lasts about 10 days after opening. Shelf-stable cashew milk, once opened, should be used within 7 to 10 days. Signs of spoilage include off smells, visible mold, or rancid taste. Rancidity develops when the unsaturated fats oxidize, which happens faster in warm, humid, or bright conditions—another reason to store in a cool, dark place.

Cashews and common health concerns

Cashews are tree nuts, so anyone with a tree nut allergy must avoid them. Cross-reactivity between tree nuts varies—some people with cashew allergy tolerate almonds or walnuts, while others react to multiple tree nuts. If you have a known tree nut allergy, do not assume cashews are safe without medical guidance. Cashews are not a common allergen compared to peanuts (which are legumes, not tree nuts), but reactions can be severe.

Cashews are high in oxalates, compounds that bind calcium and may contribute to kidney stone formation in people with a history of stones. If you have had kidney stones or have been advised to limit oxalates, ask your doctor about portion size. For most people without kidney issues, the amount of oxalate in a one-ounce serving is not a concern. Cashews are also calorie-dense, so eating them mindlessly from a bowl can add 150+ calories without satiety. Measuring portions and pairing them with fiber-rich foods helps prevent overconsumption.

Comparing cashews to other nuts you might choose

Cashews are higher in carbohydrates and lower in fiber than almonds, walnuts, or pecans. One ounce of almonds has 6 grams of fiber compared to cashews' 1 gram. If fiber intake is your priority, almonds or walnuts are better choices. Cashews are lower in omega-3 fatty acids than walnuts, which contain 2.5 grams per ounce compared to cashews' negligible amount. If you're looking for plant-based omega-3s, walnuts are the stronger option.

Cashews do contain more copper and magnesium than most other nuts, making them valuable if those minerals are your focus. Brazil nuts deliver more selenium, and pistachios have more potassium. The best approach is to rotate among several nuts rather than relying on one type. This gives you access to the full range of nutrients each nut offers and prevents boredom with a single flavor.

Frequently Asked Questions

Are raw cashews actually raw?

No. All cashews sold in stores have been heat-treated to remove toxic oils from the shell. Marketing labels sometimes use "raw" to mean "not roasted after shelling," but the nut has still been processed. True raw cashews with the shell intact are not sold in North America because the shell oils are dangerous to handle.

Can I eat cashews if I have a peanut allergy?

Possibly, but not automatically. Peanuts are legumes, not tree nuts, so a peanut allergy does not automatically mean you'll react to cashews. However, some people are allergic to multiple tree nuts. If you have never eaten cashews and have a peanut allergy, introduce them under medical supervision or with guidance from your allergist.

How much cashew butter should I eat in one serving?

Two tablespoons (about 32 grams) is a standard serving and contains roughly 190 calories and 7 grams of protein. This is equivalent to about 1.5 ounces of whole cashews. Measure with a spoon or kitchen scale rather than eyeballing, since cashew butter is straightforward to overeat.

Do I need to refrigerate cashews after opening?

Whole roasted cashews stay fresh at room temperature in an airtight container for two to three months. Refrigeration extends this to eight to twelve months. Refrigerate if your kitchen is warm or humid, or if you want maximum shelf life. Cashew butter and cashew milk should be refrigerated after opening.

What's the difference between cashew milk and cashew cream?

Cashew milk is blended cashews strained to remove solids, resulting in a thin liquid with 25 to 40 calories per cup. Cashew cream is made the same way but with a higher ratio of cashews to water, creating a thicker product with more calories and fat. Cashew cream works better in cooking and coffee; cashew milk works better as a beverage or cereal topper.