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Plant-Based Milk Types Compared

Plant-based milks differ a lot more than their shared "milk alternative" label suggests β€” in protein content, how they behave in coffee, and how well they hold up in baking. Here is how the most common options compare.

Soy milk

The plant milk closest to dairy in protein content, which makes it a common recommendation for people replacing dairy milk for nutritional reasons. It has a slightly beany flavor some people notice and can curdle in very acidic coffee if not specifically formulated for that use.

Oat milk

Naturally creamy and slightly sweet, oat milk has become popular in coffee shops partly because it steams and froths well, similar to dairy milk. It is higher in carbohydrates than most other plant milks and lower in protein than soy milk.

Almond milk

Light, thin, and low in calories compared to most alternatives, almond milk has a mild nutty flavor and works well in cereal or smoothies but tends to separate more in hot coffee than oat or soy milk. It is also lower in protein than soy or dairy milk.

Coconut milk (beverage style)

Distinct from the thick canned coconut milk used in cooking, the beverage carton version is thinner and diluted for drinking. It has a mild coconut flavor, is naturally low in protein, and is one of the few plant milks that is naturally lactose- and soy-free with a very different fat profile from other options.

Rice milk

The mildest-tasting and thinnest of the common plant milks, and typically the option with the lowest allergen risk, since it avoids soy, nuts, and gluten. It is also higher in carbohydrates and lower in protein than most alternatives, making it less filling on its own.

Why the "milk" label covers such different products

Plant milks are made through very different processes β€” soaking and blending legumes or grains, then straining out the solids β€” so their nutritional profile depends heavily on the base ingredient. A milk made mostly from a starchy grain like rice will behave very differently from one made from a protein-rich legume like soy, even though both are marketed the same way.

Barista-labeled versions are formulated differently from regular cartons

Plant milks sold specifically as "barista" versions are usually reformulated with different fat and protein ratios or added stabilizers specifically to froth and steam well without curdling in hot espresso, which is why a regular oat milk carton and a barista oat milk carton from the same brand can behave noticeably differently in a latte.

Frequently Asked Questions

Which plant milk is closest to dairy milk nutritionally?

Soy milk is generally considered the closest match, mainly due to its comparable protein content, which is one reason it is often the default recommendation for people substituting dairy for nutritional rather than taste reasons.

Why does my plant milk curdle in hot coffee?

It usually happens when the milk's proteins react to the acidity and heat of the coffee, an effect that is more common in milks not specifically formulated for coffee. Using a barista-labeled version, or adding the milk more gradually rather than pouring it in all at once, usually reduces the issue.