Soybeans
Mature soybeans, soaked and boiled until soft. Mash them or flatten every bean.
Checked against official guidance on October 18, 2026 · How we review
Quick answer
Babies can eat soybeans from around 6 months, once they show signs of being ready for solids. Prepare it as shown below.
How to serve soybeans by age
6 months+
Mashed soybeans
Use canned soybeans, or dried soybeans that have been soaked and boiled until very soft. Mash them with a fork or blend them with a little water, breast milk or formula until smooth. Serve on a pre-loaded spoon, or spread the mash on soft toast strips once wheat has been introduced on its own. Check the bread label for honey, which isn't safe before 12 months.
- Size
- Mashed or blended smooth on a pre-loaded spoon, or spread on a toast strip about the size of an adult finger, roughly 6–8 cm long and 2 cm wide (2½–3 × ¾ in).
- Check before serving
- Look for whole or half beans in the mash and squash any you find. Nothing round or firm should be left.
US and UK advice differ here. The AAP suggests mashed food or soft pieces no larger than ½ inch; the NHS suggests soft finger-sized pieces your baby can hold in their fist. Both agree the food must squash easily.
9 months+
Flattened beans
Press each soft-cooked bean flat with your thumb or a fork before serving, so your baby can practice the pincer grasp. You can also keep serving it mashed, or mashed into rice or vegetables.
- Size
- Each bean squashed flat, pieces no bigger than about 1 cm (just under ½ inch).
- Check before serving
- Squash a bean between your thumb and finger. It should flatten easily. If it springs back or stays firm, cook the beans longer.
12 months+
Flattened or mashed, or in dishes
Serve flattened soybeans in soups, stews, soft stir-fries or bean patties. Take your child's portion out before adding salt or soy sauce. Keep flattening each bean: whole beans are a choking hazard.
- Size
- Flattened beans or pieces about 1 cm (just under ½ inch).
- Check before serving
- Still do the squash test on every batch.
18 months+
Flattened or in family meals
Add flattened or roughly mashed soybeans to family stews, grain bowls or dips. Keep flattening the beans for toddlers and young children, and skip crunchy roasted soy nuts.
- Size
- Flattened beans, or pieces about 1 cm (just under ½ inch) as part of a dish.
- Check before serving
- Still do the squash test, and check mixed dishes for whole or firm beans.
Always have your child sit upright in a high chair or at the table, and stay with them the whole time they eat. Keep to the size and texture for their stage. Every baby develops on their own timeline.
How to prepare soybeans
- 1
Canned soybeans are the easiest choice: they're already soaked and boiled. Pick no-salt-added, then drain and rinse them under running water.
- 2
Dried soybeans: rinse them, soak them for at least 12 hours, then pour away the water. Boil them in fresh water for at least 45 minutes, and keep going until each bean squashes easily. This often takes much longer. Don't add salt, and don't use a slow cooker.
- 3
Drain and let them cool, then mash, blend or flatten each bean.
- 4
Do the squash test before serving.
- 5
First time? Pick a day your baby is well, at home, when you can watch them for a couple of hours afterward.
How much to offer
For the very first taste, offer a small amount: a teaspoon of mash or a thin spread on one toast strip. If there's no reaction, offer more next time. Your baby decides how much to eat: stop when they turn away or close their mouth. Once soy is in their diet, keep offering it regularly.
Common mistakes
Undercooking dried soybeans
Raw soybeans contain natural substances, trypsin inhibitors and lectins, that interfere with digestion. Boiling destroys the lectins and almost all of the trypsin-inhibitor activity. In a lab study, soybeans soaked for 12 hours and boiled for 45 minutes had no active lectin left, so soak for at least 12 hours, change the water and boil for at least 45 minutes, until very soft. Or use canned.
Using a slow cooker
The UK Food Standards Agency says raw or undercooked beans can be risky, and not to slow-cook raw red kidney beans because it doesn't destroy their natural toxin. Our suggestion is to apply the same rule to dried soybeans: boil them on the stove, or use canned.
Serving whole beans
Whole beans are firm and round, and the CDC lists them as a choking hazard. Mash them for young babies and flatten each one for older babies and toddlers.
Offering roasted soy nuts
Roasted soybeans are small, hard and crunchy, and the CDC says to avoid small, hard foods that are difficult to chew. Use soft-cooked beans instead.
Questions parents ask
Can soybeans be a choking hazard for babies?
Whole soybeans are firm and round, and whole beans are on the CDC's list of choking hazards for young children. Cook them very soft, then mash them for young babies and flatten every bean for older babies and toddlers. Never give roasted, crunchy soy nuts. Stay with your child during meals.
Can babies be allergic to soybeans?
Soybeans are a soy food, and soy is one of the most common food allergens in young children. Introduce soy from around 6 months, on its own and in a small amount, and watch for signs of a reaction. If your baby already eats tofu, edamame or other soy foods without a reaction, soybeans are not a new allergen for them. Soy allergy usually shows up in babies and children under 3, and many children outgrow it. Once tolerated, keep soy in your baby's usual diet. Being allergic to soy doesn't mean a child is also allergic to peanut: they are separate allergies.
Are soybeans healthy for babies?
A source of protein, iron and calcium: 100 g of soybeans boiled without salt has about 18 g of protein, 5.1 mg of iron and 102 mg of calcium, according to USDA FoodData Central. Babies need 11 mg of iron a day from 7 to 12 months. This is plant iron, which the body absorbs better when vitamin C is eaten at the same meal.
Are raw soybeans safe for babies?
No. Raw or undercooked soybeans contain trypsin inhibitors and lectins, natural substances that interfere with digestion. Soaking and then boiling until soft destroys the lectins and almost all of the trypsin inhibitors. Canned soybeans are already cooked.
What's the difference between soybeans and edamame?
Edamame are young, green soybeans that cook in a few minutes. Mature soybeans are dried and need a long soak and a long boil before they're soft enough for a baby. Both are soy, so if your baby already eats one without a reaction, the other isn't a new allergen.
Can babies eat canned soybeans?
Yes. Canned beans are already soaked and boiled. Choose no-salt-added, drain and rinse them, and mash or flatten them for your baby.
If your baby refuses soybeans
- Many babies need 10 or more tries before they accept a new food. Keep offering it alongside foods they already like.
- Try another form: mashed on toast, flattened, or mashed into rice or a vegetable purée.
- Eat some yourself at the same meal. Babies copy what they see.
- Funny faces don't mean they dislike it. They're getting used to a new taste and texture.
Never force or pressure your baby to eat. Some days they'll eat more, some days less, and that's normal.
Buying and storing soybeans
- Keep dried soybeans in a sealed container in a cool, dry cupboard.
- Cooked soybeans keep for 3 to 4 days in a covered container in the fridge. Move leftover canned beans out of the can into a covered container. Rice dishes are the exception: cool them within 1 hour, keep them in the fridge for no more than 1 day, and reheat them only once.
- Cooked soybeans can be frozen for 3 to 4 months, and soybean mash used within 3 months. Thaw them in the fridge, use them within 24 hours of thawing, and reheat them only once, to 165°F (74°C), until steaming hot, then let them cool before serving.
- Throw away any food left out at room temperature for more than 2 hours (1 hour if it's hotter than 90°F / 32°C).
When to talk to your doctor
Contact your pediatrician, GP or health visitor if:
- Your baby vomits a few hours after eating soy. This can be FPIES, a delayed type of food allergy that soy can trigger. If they vomited once or twice and seem alert and like themselves, call your pediatrician or GP. If they vomit again and again, or are pale, floppy, very sleepy or hard to wake, call your emergency number.
- Your baby has had any reaction to soy, even a mild one. Stop offering it until you've talked to your pediatrician.
- You notice mild signs of an allergic reaction after eating, such as a few hives or a little vomiting. See signs of a reaction.
- You're worried about how much your baby eats, their growth, or they refuse most solid food for weeks.
Call 911999your local emergency number (such as 112 in Europe or 000 in Australia) now if your baby has trouble breathing, wheezing, can't cough or cry, has lips, mouth, tongue or throat that suddenly swell, or becomes pale, bluish, floppy or unresponsive. Also call if hives come with repeated vomiting.
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Helpful guides
Sources
- CDC: Choking hazards
- ACAAI: Soy allergy
- NHS: Food allergies in babies and young children
- ACAAI: Food protein-induced enterocolitis syndrome (FPIES)
- Luo et al., Foods (2025): Advancements in inactivation of soybean trypsin inhibitors
- Adamcová et al., Foods (2021): Lectin activity in commonly consumed plant-based foods
- Food Standards Agency: Home food fact checker
- USDA FoodData Central: Soybeans, mature cooked, boiled, without salt
- NIH Office of Dietary Supplements: Iron
- USDA FSIS: Leftovers and food safety
- AAP: Is it OK to make my own baby food?
- NHS Best Start in Life: Storing and reheating food
- NHS: Foods to avoid giving babies and young children
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