§02 · Pantry · Legumes & Soy · soy-milk
Soy Milk · Unsweetened, unfortified
The one plant milk with enough protein to behave like dairy: it enriches a porridge, builds a batter, and turns into a creamy soup or a béchamel without splitting. Unsweetened, it's just soybeans and water doing a lot of work.
Recipes that feature soy milk
Browse all 10 recipes →
How to cook it
- Use it straight from the carton wherever a recipe calls for milk, cup for cup.
- To make it savory in a soup or sauce, keep the heat below a hard boil so it stays smooth.
- For a curdled buttermilk stand-in, stir in a teaspoon of vinegar per cup and let it sit five minutes.
In the kitchen
Soy milk is the plant milk that cooks. Its protein lets it thicken a sauce, enrich a porridge, and take the heat of a soup without curdling, where thinner milks break or stay watery. Pour it into pancake and muffin batters, whisk it into a savory béchamel, or simmer it into a creamy soup. Soured with a little vinegar, it does the job of buttermilk.
Keep the unsweetened kind and you can send it in either direction: cinnamon and maple for breakfast, or garlic and nutritional yeast for a savory sauce. Just hold it below a hard boil in anything savory, and it stays smooth.
Health
Soy milk carries more protein than any other plant milk, close to what dairy offers, which is what lets it cook like dairy too. It’s a whole-soybean food with little saturated fat.
EAT-Lancet counts soy among the legumes it builds the plate on. One honest note: this is the unfortified kind, just soybeans and water, so unlike many cartons it doesn’t add the calcium, vitamin D, or B12 that fortified plant milks do. If those are what you’re after, a fortified soy milk covers them; for cooking, the plain version is the more flexible tool. The research behind the soy call is linked below.
What it contains
Vitamins & minerals
What the frameworks say
- EAT-Lancet Soy foods target 25 g/day
- Mediterranean Not counted
- DASH Not counted
- Daily Dozen Not counted
Research
The scorecard
- Cost
- $0.62 / serving Walmart · tracked Aug 2026 · priced from Walmart — WestSoy Organic Unsweetened Soymilk, 64 fl oz at $4.98; unit price carried to the 32 fl oz carton.
- Shelf life
- 9 months in the pantry manufacturer guidance — unopened carton; refrigerate after opening (7-10 days).
MVP is the weighted composite of these four axes — methodology & weights. It describes items already in the pantry; it never decides membership.
What swaps in
- Fortified soy milk
- same milk with added calcium, D and B12 — the trade is a longer ingredient list
- Dairy milk
- 1:1; the closest match for protein and body
- Oat milk
- creamier and sweeter, about a third the protein
- Almond milk
- thinner, with almost no protein
Common questions
Can I cook with soy milk like regular milk?
Yes, and it holds up better than most plant milks. Its protein lets it thicken a sauce and take heat without splitting, as long as you keep it below a rolling boil. Use it cup for cup.
Why do you keep unsweetened soy milk instead of the sweetened kind?
Because it works in savory cooking as well as sweet. Sweetened or vanilla soy milk turns a béchamel or a soup faintly dessert-flavored; unsweetened goes anywhere, and you add sweetness only where you want it.
Can I make buttermilk with it?
Yes. Stir a teaspoon of any vinegar or lemon juice into a cup of soy milk and wait five minutes. It curdles slightly and stands in for buttermilk in pancakes, muffins, and quick breads.
What can I make with soy milk?
You'll find soy milk in 10 recipes here, and the ones that use the most are Warm Spiced Oatmeal, Aaron Chow Breakfast, and Blueberry-Walnut Baked Oatmeal.
How long can you store soy milk?
About 9 months in the pantry — unopened carton; refrigerate after opening (7-10 days).
Is there gluten in soy milk?
No — soy milk are gluten-free.
How much does a serving of soy milk cost?
About $0.62 a serving at US retail (Aug 2026), from Walmart — WestSoy Organic Unsweetened Soymilk, 64 fl oz at $4.98; unit price carried to the 32 fl oz carton.
MVP field manual · soy-milk · reviewed Aug 2026