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Home › Recipes › Free Video

Updated on August 9, 2019 by Liz Marek · This post may contain affiliate links ·

How to Pour Geode Crystal Molds

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Skill level: Newb

Learn how to pour isomalt into silicone molds. Please be very careful with melted isomalt, as it will be extremely hot. Wear protective eyewear and gloves.

4:05 Minutes of Instruction

What You Will Learn

  • How to melt and pour isomalt into silicone molds
  • How to color isomalt

Tutorial Directions

  1. Melt isomalt crystals in a silicone container. Microwave on high for 15 second intervals until completely melted.
  2. Wait for isomalt bubbles to disperse. This reduces the bubbles in the finished piece.
  3. Secure your silicone mold by wrapping a rubber band around the 2 parts of the mold two times. Be sure to check that the mold lines up correctly and there are no gaps.
  4. Slowly pour isomalt into mold, starting in the middle of the mold. Pour a thin ribbon of isomalt into the mold to avoid any air bubbles forming.
  5. Gently tap mold on hard surface to cause any bubbles in the isomalt to rise to the top and escape.
  6. Let isomalt fully cool until set.
  7. Gently test middle of isomalt to see if set, only test after waiting several hours.
  8. Gently remove rubber band.
  9. Slide mold off, 1 part at a time. Carefully slide "up and down" not "side to side"
    or isomalt will break.
  10. Isomalt will be cloudy; don't worry this is normal.
  11. Heat a paring knife with cremé brule torch. Be careful not to burn your hands.
  12. Knife may become discolored. Usually this is just leftover isomalt and can be cleaned off.
  13. Slide knife on edge of isomalt crystals. This will bring back the shine of the isomalt.
  14. Clean knife after every use. Wipe knife on damp paper towel to remove isomalt, then reheat.
  15. Keep going until every crystal edge is shiny.
  16. Optional Method: Adding Color
  17. Add powdered food color to melted isomalt. Be sure to use a silicone mixing tool.
  18. Highlighters mixed with everclear work well for edges. Experiment with colors for different effects.
  19. Seal finished pieces with PME clear glaze spray.
  20. Purchase the whole Sugar Geek Show crystal mold line, available now at simicakes.com

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About Liz Marek

Liz Marek is a professional cake artist and recipe developer who has been teaching baking and cake decorating since 2008. She founded Artisan Cake Company in Portland, Oregon in 2009 and now runs Sugar Geek Show, where she publishes kitchen-tested recipes, food science explanations, and step-by-step tutorials.

Liz is best known for sculpted and hyperrealistic cakes. She won Netflix's Is It Cake? Holiday 2 in 2025 with a hyperrealistic Santa cake, and has competed on and won Food Network cake competitions. Cake Masters Magazine named her one of the top 10 cake artists in 2017. She is the author of Artisan Cake Company's Visual Guide to Cake Decorating and a graduate of the Oregon Culinary Institute.

Her focus is on explaining not just how a recipe works but why it works, so bakers can troubleshoot instead of guess. Every recipe on this site is tested before it's published.

Liz teaches full-length cake tutorials, including sculpted and hyperrealistic cakes, at Sugar Geek University.

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Hi, I'm Liz! I'm a cake artist and recipe developer, and I won Netflix's Is It Cake? Holiday 2 with a hyperrealistic Santa. I write foolproof recipes that explain why things work, not just how.

I also teach full-length cake tutorials, including sculpted cakes, at Sugar Geek University.

More about me →

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