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How to Make a Soy Latte: Ratios, Steps and 3 Variations

SOYCLUB Editorial · 2026.10.19 · 5 min read

Get the soy latte ratio right: 1:6 for an iced soy latte, plus hot and no-machine versions. Learn why soy milk curdles in coffee and three easy variations.

What is a soy latte?

A soy latte is a latte made with soy milk instead of dairy milk. The bitterness of coffee meets the gentle aroma of soybeans, and it tastes lighter than a regular latte. It is also the plant-milk option on many café menus. With espresso or coffee concentrate and a good carton of soy milk, you can make a café-style soy latte at home.

The best soy latte ratio

Iced soy latte in 3 steps

1. Fill a glass halfway with ice and pour in cold soy milk.
2. Slowly pour the espresso over the ice to create layers.
3. Stir before drinking and add a little syrup if you like it sweeter.

Hot soy latte

1. Heat the soy milk on low or in the microwave to about 60–65°C, until small bubbles form at the edge but before it boils.
2. Froth for 20–30 seconds to make silky soy foam.
3. Pour the coffee into the cup, add the hot soy milk and spoon the foam on top.

Soy milk curdling in coffee? 3 tips

Soy proteins can form small clumps when they meet coffee that is very hot or noticeably acidic. This is a normal physical reaction, not a sign the soy milk has gone off. Here's how to avoid it:

• Soy milk first, coffee second. Let the coffee blend in gradually instead of pouring soy milk into a big cup of hot coffee.
• Match the temperatures. Heat the soy milk for a hot latte; use cold soy milk and ice for an iced one.
• Choose a lower-acid coffee. Medium-dark roasts pair best with soy milk; bright, fruity light roasts curdle more easily.

3 soy latte variations

1. Brown sugar soy latte

Drizzle 15ml of brown sugar syrup inside the glass, then add ice, soy milk and coffee. The caramel notes go beautifully with soy. See the brown sugar soy recipe on our recipes page.

2. Matcha soy latte

Swap the coffee for whisked matcha and you have matcha soy. Add both and you get the popular "dirty matcha". See our matcha soy recipe for ratios.

3. Cinnamon vanilla soy latte

Dust a hot soy latte with cinnamon, or add 5ml of vanilla syrup, for a cosy winter drink.

Which soy milk works best in a latte?

Soy milk for lattes needs enough soybean flavour and a smooth texture; thin soy milk turns watery once coffee is added. SOYCLUB Whole Soy Milk is made from Italian soybeans with 12g of protein per serving. It is rich and smooth, great on its own or in coffee.