Unsweetened cashew milk is one of the most keto-friendly milks available, with just 1 gram of net carbs per cup. That’s a negligible amount even on a strict 20-gram daily carb limit, making it an easy swap for regular dairy milk in coffee, smoothies, and recipes.
Net Carbs and Nutrition Breakdown
A standard 8-ounce cup of unsweetened cashew milk (like Silk’s version) contains 25 calories, 2 grams of fat, 1 gram of total carbs, zero grams of sugar, and 0.5 grams of protein. Since there’s no fiber to subtract, the net carb count stays at 1 gram. That single gram of carbs leaves plenty of room in a typical keto daily budget of 20 to 50 grams.
Unsweetened cashew milk also scores a glycemic index of zero, meaning it has virtually no measurable effect on blood sugar. For anyone tracking glucose responses alongside ketosis, this makes it a reliable choice that won’t cause unexpected spikes.
How It Compares to Other Milks
Cashew milk and unsweetened almond milk are nearly identical on paper. Both clock in at about 1 gram of carbs per cup with zero sugar. Either one works equally well on keto, so the choice comes down to taste and texture. Cashew milk tends to be slightly creamier, which some people prefer in coffee or creamy sauces.
Regular cow’s milk is a different story. An 8-ounce glass of reduced-fat (1%) milk contains over 12 grams of carbs, almost all from naturally occurring lactose. That’s more than half of a strict keto daily limit in a single glass. Whole milk is similar, landing around 11 to 12 grams per cup. Switching from dairy milk to unsweetened cashew milk saves you roughly 11 grams of net carbs per cup, which adds up fast if you drink multiple servings a day or use it in cooking.
Oat milk is another popular option that performs poorly on keto. Most unsweetened oat milks contain 7 to 16 grams of carbs per cup because oats are naturally starchy. Coconut milk (the carton variety, not canned) is another low-carb option, typically around 1 to 2 grams per cup.
Sweetened Versions Will Knock You Out of Ketosis
The “unsweetened” label matters. Sweetened or flavored cashew milks can contain 5 to 15 grams of added sugar per cup, turning a keto-safe drink into one that could use up a significant chunk of your daily carb allowance. Vanilla-flavored versions are particularly sneaky because they often contain added sweeteners even when the packaging emphasizes “real vanilla.”
Always check the nutrition label for total carbohydrates and added sugars. The ingredient list should be short: water, cashews, and possibly a stabilizer like gellan gum or sunflower lecithin. If sugar, cane sugar, or brown rice syrup appears in the ingredients, skip it.
Using Cashew Milk on Keto
The low calorie and fat content of cashew milk (25 calories and 2 grams of fat per cup) means it won’t contribute much to your daily fat goals on keto. That’s fine for lightening coffee or pouring over low-carb cereal, but if you want a more substantial, higher-fat milk for smoothies or fat bombs, canned coconut milk (full fat) or heavy cream blended with water will give you more calories from fat per serving.
For cooking, cashew milk works well in keto soups, curries, and baked goods where you need a liquid base without adding carbs. Its naturally mild, slightly sweet flavor blends into savory and sweet dishes without competing with other ingredients. If you need a thicker consistency for sauces or chowders, reducing cashew milk on the stovetop or adding cream cheese thickens it without extra carbs.
Homemade Cashew Milk
Making cashew milk at home is straightforward: soak raw cashews for a few hours, blend them with water, and strain if desired. Homemade versions are denser in cashew content than commercial brands, which means slightly more fat and calories per cup, but the carb count stays low. A typical homemade batch using a quarter cup of cashews per cup of water still lands under 3 to 4 grams of net carbs per serving.
The advantage of homemade is control. No stabilizers, no added ingredients, and you can adjust the thickness by changing the cashew-to-water ratio. The trade-off is a shorter shelf life of about 3 to 4 days in the refrigerator compared to weeks for store-bought cartons.