Japanese Coffee Jelly

Coffee jelly is a simple dessert of sweetened black coffee set with gelatin or agar, cut into cubes and served with cream or milk. It is especially popular in Japan, where it is called kōhī zerī and sold everywhere from cafés to convenience stores. You can make it at home in 10 minutes of active time with just coffee, sugar and a setting agent.

This guide gives you two versions, one with gelatin and one with agar, plus the best ways to serve it.

What Is Japanese Coffee Jelly?

Coffee jelly is exactly what it sounds like: coffee that has been turned into a jelly. The texture ranges from soft and wobbly to firm and bouncy depending on the setting agent. The flavor is mildly sweet and pleasantly bitter, which is why it is almost always served with something creamy to balance it.

Although it is closely associated with Japan, coffee jelly did not start there. Recipes for coffee jelly appear in English cookbooks in the early 1800s, and coffee gelatin was long a New England dessert in the United States. Japan adopted it in the Taishō period (1912–1926), when Western-style cafés became fashionable, and it has stayed a beloved café dessert ever since.

Gelatin vs Agar for Coffee Jelly

Both work beautifully, but they give different results. Gelatin comes from animal collagen; agar (called kanten in Japan) is made from seaweed and is suitable for vegetarians and vegans.

Coffee Jelly Recipe with Gelatin

Makes 4 servings.

Ingredients

• 2 cups (480 ml) freshly brewed strong coffee, hot
• 1/4 cup (50 g) sugar, adjust to taste
• 1 envelope (1/4 oz or 7 g, about 2 1/4 tsp) unflavored powdered gelatin
• 3 tablespoons (45 ml) cold water

Steps

1. Sprinkle the gelatin over the cold water in a small bowl. Leave it for 5 minutes to bloom; it will look spongy.
2. Stir the sugar into the hot coffee until dissolved. The coffee should be hot but not boiling.
3. Add the bloomed gelatin and stir for about a minute until completely dissolved.
4. Pour into a shallow container, such as an 8 x 8 inch (20 x 20 cm) dish, or into individual glasses.
5. Cool to room temperature, cover and refrigerate for at least 4 hours, or overnight.
6. Cut into 3/4 inch (2 cm) cubes, or break it up with a fork for a looser texture.

Coffee Jelly Recipe with Agar

Makes 4 servings. Agar brands vary in strength, so check the package directions and adjust.

Ingredients

• 2 cups (480 ml) strong coffee
• 1/4 cup (50 g) sugar
• 2 teaspoons (4 g) agar powder

Steps

1. Pour the coffee into a small saucepan and whisk in the agar powder while the coffee is still cool or warm, so it does not clump.
2. Bring to a boil over medium heat, stirring, then simmer for 2 minutes to fully activate the agar.
3. Remove from the heat and stir in the sugar until dissolved.
4. Pour into a dish or glasses. It will begin to set as it cools, so work quickly.
5. Refrigerate for about 1 hour until firm and cold, then cut into cubes.

For a softer, more jiggly agar jelly, use 1 1/2 teaspoons (3 g) instead of 2.

How to Serve Coffee Jelly with Cream

The jelly itself is only lightly sweet, so the topping does a lot of work. Popular ways to serve it:

• Classic Japanese style: Cubes in a glass with a drizzle of heavy cream or evaporated milk and a little simple syrup.
• With whipped cream: Top with softly whipped, lightly sweetened cream.
• With ice cream: A scoop of vanilla ice cream on top melts into a coffee float.
• As a drink: Drop cubes into an iced latte or a glass of cold milk and drink with a wide straw, like boba. Our iced latte recipe is a great base.
• Sweetened condensed milk: A spoonful gives a rich, dessert-like twist reminiscent of Vietnamese iced coffee.

Tips and Variations

• Brew it strong. Use about 1.5 times your normal coffee dose. Cold dulls flavor, so a regular-strength cup tastes weak as jelly. Our guide to the coffee to water ratio helps you dial it in.
• Cold brew works. For a smoother, less bitter jelly, use cold brew concentrate diluted to drinking strength and gently warm it to dissolve the gelatin.
• Try flavored coffee. Vanilla, caramel or hazelnut coffee makes a jelly that needs almost no added sugar.
• Layer it. Make a white milk layer (milk, sugar and gelatin) and set it over the coffee layer for a striped dessert.
• Storage. Keep covered in the fridge for up to 3–4 days.

Coffee Jelly FAQ

What does coffee jelly taste like?

It tastes like lightly sweetened black coffee with a smooth, bouncy texture. On its own it is fairly bitter, which is why cream or milk is added to balance it. The final flavor is a lot like an iced coffee you can eat with a spoon.

Does coffee jelly have caffeine?

Yes, it contains about the same caffeine as the coffee used to make it, so a serving made with 1/2 cup of strong coffee has the caffeine of roughly half a cup. Use decaf for an evening dessert. The FDA cites up to 400 mg a day as generally safe for most healthy adults; ask your doctor if you are pregnant, have a medical condition or take medication.

Why did my coffee jelly not set?

With gelatin, the most common causes are boiling the coffee after adding gelatin or not using enough. With agar, it usually means the mixture was not boiled long enough. Fresh pineapple, kiwi or papaya can also stop gelatin from setting.

Can I use instant coffee for coffee jelly?

Absolutely. Dissolve instant coffee in hot water at a slightly stronger ratio than usual, then follow either recipe. It is the quickest way to make coffee jelly.

Make Your Own Café-Style Coffee Jelly

Coffee jelly is one of the easiest coffee desserts you can make, and it rewards good coffee. For a rich, chocolatey jelly try our nutty Brazil Santos; for an instant shortcut, our Premium Instant Coffee dissolves in seconds. Feel like a flavored version? Explore Feel Espresso’s flavored coffees, all roasted 1–5 days before delivery.