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Edible Crystals (Easy Kohakutou Clusters Recipe)
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Edible Crystals (Easy Kohakutou Clusters Recipe)
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Ms Shi & Mr He
By Ms Shi & Mr He

Edible Crystals (Easy Kohakutou Clusters Recipe)

8 steps
Prep:10minCook:15min
Edible crystals, or kohakutou (琥珀糖), is a beloved traditional Japanese snack made from agar agar. With just three simple ingredients and a silicone mold, you can produce a large sheet of heart-shaped or mineral cluster-shaped edible crystals without breaking the bank, all for under $5.
Updated at: Sat, 26 Jul 2025 09:34:04 GMT

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Instructions

Step 1
In a small saucepan, combine ¼ cup of juice (or water, tea, soft drinks) and sprinkle ½ tsp of agar agar powder over it. Stir the mixture until the agar agar powder is fully dissolved.
Step 2
Place the mixture on medium heat and bring it to a simmer. Add ½ cup of sugar and stir until it is completely dissolved. Allow the mixture to cook over medium heat for approximately 5 minutes until the syrup thickens in consistency and takes on a light yellow hue.
Step 3
Transfer the mixture into a heart silicone mold. If there is any remaining mixture, you can pour it into a regular food storage container. Once the mixture is set, you can cut the jelly into small pieces and reshape them using the heart mold as desired.
Step 4
To create a variety of edible crystals, follow the previous steps, utilizing different flavors and colors of drinks. Alternatively, you can apply a few drops of food colorings to the mixture to achieve a colorful assortment of the crystal candies.
Step 5
Allow the mixture in the mold to cool down to room temperature, then place it in the refrigerator overnight until it's fully set.
Step 6
Remove the jelly from the heart silicone mold. Arrange the heart-shaped jellies on a large sheet of parchment paper, ensuring they are placed in a single layer without touching each other to prevent sticking. Allow them to sit at room temperature for 3 to 5 days, away from direct sunlight, until a firm crust forms on the surface.
Step 7
To create edible crystal clusters, take a large piece of jelly and cut it into irregular fingertip-sized pieces. Arrange these small pieces closely together within the heart-shaped silicone mold and allow them to dry in the mold for about 5 days until they adhere to each other and develop a solid crust on the surface.
Step 8
Store in an air tight container at room temperature (avoid high temperature or direct sunlight) for up to 1 month.
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