Japanese coffee jelly (kōhī zerī) is one of those quietly iconic desserts that feels both nostalgic and modern at the same time. Lightly sweet, gently bitter and wonderfully refreshing, it’s made by setting strong coffee with agar agar, cutting it into soft, bouncy cubes, then pouring over a silky sweetened milk to serve. Simple, delicious and not too sweet.
This is the kind of dessert you’ll find in Japanese konbini and home kitchens alike, especially in the warmer months, when you want something cooling and coffee-forward without committing to a full cake or pastry. It’s naturally no-bake, easy to prepare ahead of time and easily customisable. Could this be the new after dinner affogato?!
If you love coffee desserts that aren’t cloying, or you’re looking for a light Asian-inspired dessert to finish a meal, this Japanese coffee jelly is one you’ll come back to again and again.
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What Is Japanese Coffee Jelly?
Japanese coffee jelly, also known as kōhī zerī, is a light, refreshing dessert made by setting brewed coffee with agar agar instead of gelatin. Once set, the jelly is cut into soft cubes and served chilled with a pour of sweetened milk or cream.
It’s a familiar and much-loved dessert in Japan, commonly found not just in cafés and traditional kissaten, but also sold ready-to-eat in convenience stores. You’ll often spot individual cups of coffee jelly in the chilled dessert section, especially in the warmer months, making it an everyday treat as much as a café staple.
Unlike Western-style gelatin desserts, coffee jelly made with agar agar has a cleaner bite and holds its shape well, even at room temperature. The flavour is gently bitter from the coffee, balanced by the creamy sweetness of the milk, making it especially appealing to coffee lovers who prefer desserts that aren’t overly sweet.
Why You’ll Love This Recipe
If you enjoy coffee desserts that are light, elegant and not too sweet, this Japanese coffee jelly ticks all the boxes.
- Light and refreshing – Set with agar agar, this coffee jelly has a clean, delicate texture that feels cooling and never heavy.
- Perfectly balanced flavour – The gentle bitterness of coffee paired with sweetened milk creates a dessert that’s rich yet restrained.
- No-bake and make-ahead friendly – There’s no oven involved, and the jelly can be prepared in advance and chilled until ready to serve.
- Coffee-lover approved – This dessert puts coffee front and centre, without masking its flavour with too much sugar.
- Simple ingredients – Made with everyday pantry staples, plus agar agar, for a dessert that feels special without being complicated.
Ingredients & Substitutions
- Strong brewed coffee – Use good-quality coffee with a flavour you enjoy. Instant coffee will work if that is all you have on hand.
- Castor sugar – Also known as superfine sugar.
- Agar agar powder – Used to set the jelly. This is commonly found at Asian grocers.
- Evaporated Milk – Evaporated milk is my preference because of its richness, however any milk will work.
- Condensed Milk – For sweetening the milk. Sugar or a vegan alternative (e.g. coconut condensed milk) will work as well.
How to Make Japanese Coffee Jelly
Step 1: Add brewed coffee into a saucepan and top up with enough water to make 500mL of liquid total. Add sugar and agar agar powder and whisk well to fully dissolve the agar agar before heating.
Step 2: Place the saucepan over medium heat and bring the mixture to a gentle boil, stirring frequently. Once it reaches a boil, continue cooking for a minute to ensure the agar agar is fully activated.
Step 3: Remove from the heat and carefully pour the coffee mixture into a shallow dish or container. Allow it to cool slightly, then transfer to the fridge to set completely.
Step 4: Once set, cut the coffee jelly into small cubes using a sharp knife.
Step 5: To serve, divide the coffee jelly cubes into bowls or glasses and pour over sweetened milk or cream. Serve chilled.
Tips for Perfect Coffee Jelly
- Use strong coffee – The coffee flavour softens once the jelly sets and is paired with milk, so brew it a little stronger than you normally would drink.
- Whisk the agar thoroughly – Agar agar needs to be fully dissolved before heating to avoid grainy bits in the finished jelly.
- Bring it to a proper boil – Agar only activates once simmered, so make sure you can actively see bubbles when it’s sitting on the stove.
- Don’t oversweeten the jelly – Keep the jelly itself lightly sweet and let the milk do most of the sweetening for balance.
- Chill before cutting – Make sure the jelly is fully set and cold before slicing into cubes for clean edges.
Storage & Make Ahead Tips
- Make ahead friendly – Coffee jelly can be made up to 2–3 days in advance and stored in the fridge until ready to serve.
- Store separately – Keep the coffee jelly and sweetened milk separate, combining them only just before serving for the best texture and flavour.
- Use an airtight container – This helps prevent the jelly from absorbing fridge odours and keeps it fresh.
- Best served chilled – Coffee jelly is most refreshing straight from the fridge, especially in warmer weather.
Serving Suggestions
Coffee jelly is traditionally served simply, letting the flavour of the coffee shine.
- Classic style – Divide the coffee jelly cubes into glasses or bowls and pour over sweetened milk or cream just before serving.
- Set in glasses – Divide the warm coffee jelly liquid directly into serving glasses and allow it to set in the fridge. Once set, pour the sweetened milk over the top to serve.
- Extra indulgent – Swap the milk for pouring cream or add a small scoop of vanilla ice cream on top.
- Less sweet option – Serve with plain milk or unsweetened cream and let the bitterness of the coffee take centre stage.
FAQs
Can I use gelatin instead of agar agar?
Agar agar is traditional for Japanese coffee jelly and gives a firmer, cleaner texture. Gelatin will work, but the texture will be softer and more wobbly, and the setting method and quantities will be different.
How long does coffee jelly last in the fridge?
The coffee jelly will keep well in the fridge for up to 3 days when stored in an airtight container. Store the jelly and milk separately for best results.
Is coffee jelly very sweet?
No, this dessert is intentionally lightly sweet. The coffee jelly itself is gently bitter, with most of the sweetness coming from the milk poured over just before serving.
Can I make this dairy-free or vegan?
Yes. Agar agar is plant-based, and you can use any plant milk you like. Coconut milk or oat milk both work well, and coconut condensed milk can be used to sweeten.
Do I have to cut the jelly into cubes?
Cubing is the most common way to serve coffee jelly, but you can also scoop it with a spoon or cut it into larger pieces if you prefer.
🎥 Video: Watch How To Make Japanese Coffee Jelly
More Asian-Inspired Desserts to Try
If you enjoy light, refreshing desserts like this Japanese coffee jelly, you might also love some of these spoonable, chilled favourites:
- Mango Sago – A classic Hong Kong-style dessert made with juicy mango, chewy sago pearls and creamy coconut milk.
- Chè Thái – A Vietnamese-inspired dessert soup filled with tropical fruits, jellies and coconut milk.
- Mango Bango – A Filipino-style mango dessert that’s rich, creamy and bursting with fresh mango flavour.
📖 Recipe
Japanese Coffee Jelly with Sweetened Milk
Ingredients
Coffee Jelly
- 4 shots of espresso
- 50 g castor sugar
- 3 g agar powder
- Water
- Spray oil optional
Sweetened Milk
- 50 g condensed milk
- 385 mL evaporated milk
Instructions
- Add brewed coffee into a saucepan and top up with enough water to make 500mL of liquid total. Add sugar and agar agar powder and whisk well to fully dissolve the agar agar before heating.
- Place the saucepan over medium heat and bring the mixture to a gentle boil, stirring frequently. Once it reaches a boil, continue cooking for a minute to ensure the agar agar is fully activated.
- Remove from the heat and carefully pour the coffee mixture into a shallow dish or container. Allow it to cool slightly, then transfer to the fridge to set completely.
- Once set, cut the coffee jelly into small cubes using a sharp knife.
- To serve, divide the coffee jelly cubes into bowls or glasses and pour over sweetened milk or cream. Serve chilled.
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