Kohakutou- A unique crystal treat recipe
- caked4
- Oct 30, 2024
- 3 min read
Are you ready to embark on a culinary adventure that fuses science and art?
Let’s create Kohakutou, a traditional Japanese jelly-like confection that sparkles and delights both the eyes and taste buds. This crystal candy, often showcasing vibrant colors and flavours, can be a whimsical addition to any dessert table. So grab your apron and let’s try this mesmerising recipe!
What is Kohakutou?

Kohakutou, also known as "crystal candy," is a delicate dessert made primarily from agar agar, a vegetarian gelatin derived from seaweed. It’s known for its stunning translucent appearance and can be made in a variety of flavours! This recipe is not only visually appealing but also a fun activity, especially for those who enjoy crafting edible treasures!
Ingredients You'll Need:
- 12g Agar Agar
- 400ml Cold Water
- 680g Caster Sugar
- ½ tsp Fresh Lemon Juice
- 1 tsp Essence (I recommend trying elderflower or cherry for a delicious twist)

Let's Get Started!
Step 1: Prepare Your Tin
First, take a glass or metal flat base tin and grease both the base and sides with vegetable oil. This will ensure that your jelly doesn’t stick later on.
Step 2: Hydrate the Agar Agar
Place the cold water into a medium-sized pan. Sprinkle the agar agar over the top and allow it to absorb for about 5 minutes. This is a crucial step in activating the agar.
Step 3: Simmer it Down
Bring the mixture to a gentle simmer, stirring constantly with a spatula. Keep it simmering lightly for about 2-3 minutes while making sure not to let it boil over.
Step 4: Sweeten the Deal
Sprinkle in the caster sugar once it has reached a light simmer again. As the sugar dissolves, the mixture may cool and stop simmering—so bring it back up to a light simmer for another 2-3 minutes.
Step 5: Flavor Explosion
Remove from heat and add your fresh lemon juice and the essence of your choice. This is where the magic happens; the flavor will burst through the jelly.
Step 6: Pour and Swirl
Pour the mixture into your prepared flat dish. If desired, add a few drops of food coloring on top and gently swirl it with a cocktail stick to create beautiful patterns. Remember, less is more—to avoid that not-so-appealing “poo brown” color, stick to just two colors!
Step 7: Chill Out
Refrigerate the mixture for 2-3 hours until it has set completely.
Step 8: Unmold the Magic
Once set, use a knife to loosen the sides of the jelly, then carefully run your fingers under the bottom to remove it from the pan. Be gentle; we want to keep those lovely crystal shapes intact!
Step 9: The Final Touch
Cut the jelly into delightful crystal shapes. For a finishing flourish, set them on greaseproof paper to dry for 2-3 days, turning them halfway through. This will help them crystallise beautifully and gain a captivating shine!
Tips for Crystal-Clearing Success

1. Visual Aesthetics: Mixing too many colors can muddy your creation. Stick with a maximum of two vibrant colors for the best result.
2. Drying Strategy: The choice of drying surface matters! Greaseproof paper works best; silicone mats tend to retain moisture.
3. Minimal Off-Cuts: The sticky off-cuts are not waste; they can be fun mini-crystals for toppings or as decoration on cakes!
4. Support Your Treats: If you’re planning to use these elegant pieces on a cake with buttercream, consider additional support like cocktail sticks; large pieces can be a bit top-heavy.
Get Creative!

Kohakutou is a fantastic treat that sparks joy not only with its flavors but also its visual appeal. It’s perfect for parties, as gifts, or simply as a fun weekend project. Try experimenting with various flavors and colors to make each batch uniquely yours.
So go ahead and unleash your inner culinary artist!
I can’t wait to see how yours turn out!
Cx
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