Introduction: Eat Your LEGOs!
This is a 2 part project.
- How to make food safe molds for ice trays, custom chocolates or other shaped treats.
- My recipe for healthy and colorful frozen yogurt.
I chose to make a mold of LEGOs since I had them around and owe much of my inventiveness to LEGOs. You can make a mold of anything using this process. If you are planning on using the mold for food, make sure your silicone is food safe!
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Supplies
Mold Making
- Pile of LEGO bricks
- Smooth-on Sorta Clear 37
- Paper cups
- Spoon or Popsicle stick
Recipe
- Greek Yogurt
- Honey
- Vanilla Extract
- Raspberries
- Blueberries
- Orange juice
- Food coloring (optional)
Step 1: Build the LEGO Mold
Start by washing your LEGOs to get any dust or oil off of them. A bowl full of warm water and dish soap is perfectly fine.
Build your LEGOs like I have in the picture. The isolated LEGOs in the center are the ones that are going to end up making the mold. The ring of LEGOs on the perimeter will act as the wall to hold your flowing silicone in place. Make sure the LEGOs are pressed down well to keep the silicone from leaking out.
Step 2: Mix the Silicone
I chose to use Smooth-on Sorta Clear 37 because it is food safe. It can be quite thick if it’s old so sometimes it doesn’t flow well into super small features. It’s not toxic so there is very little safety concern but you can wear gloves since it’s sticky if you get it on your hands.
Calculate or measure how much silicone you are going to need. I did this by pouring water into my LEGO mold and then poured that water into a measuring glass. Shake the cans before opening and then pour part A into the cup and then pour part B on top of it. Use a spoon or Popsicle stick to mix it thoroughly for about 1-2 minutes. It may create some bubbles but don’t worry about this, it didn’t affect the end quality of the mold.
Step 3: Pour the Silicone
Slowly pour the silicone into the lowest point and let it wash over your parts. If you pour it all over your parts, you will get big bubbles in the final mold. If you notice it is leaking out anywhere, you can press the LEGOs down more or use tape to seal up some cracks. Now leave it alone until it’s cured (about 4-6 hours).
Step 4: Demolding
This is the satisfying part!
Once it’s cured, peel the LEGOs apart and remove your new mold! You may have some flash (the extra bits hanging off the mold) but that is easy to cut or pinch off. Give it one more wash in warm soapy water and it’s ready to be used!
Step 5: Frozen Lego Recipe
This is a simple and healthy frozen yogurt recipe that makes the LEGOs pop with color!
Ingredients:
- 2 cup Greek yogurt
- 3 tbsp honey
- ½ tsp vanilla extract
- ¼ cup raspberries (for pink)
- ¼ cup blueberries (for purple)
- 1 tbsp orange juice (for orange… duh)
- 1 drop of food coloring (for custom colors)
Step 6: Make the Yogurt Mix
Mix the Greek yogurt, honey and vanilla extract together in a bowl.
Step 7: Add Some Color
For each different color you want, add ½ cup of the yogurt mix and the ingredient for the color you want in a blender. Blend together for about 30 seconds until the color is consistent.
Step 8: Pour Into the Mold
Pour the colored yogurt mix into your mold. For best results, pour the mix slowly to make sure you don’t trap too many air bubbles. You can use a knife or toothpick to stir the mix in the mold to get rid of even more air bubbles.
Step 9: Freeze
Put the tray in the freezer for 2 hours and enjoy when they are ready!
Step 10: Cheers!
Hope you enjoy! Follow my other projects on Instagram @Trevor_DIY
My other Instructables:

Runner Up in the
Frozen Treats Challenge
25 Comments
1 year ago
That is SOOOOOO cool!!!! I love Legos and food so this is AWESOME!!!!! GREAT JOB!!!
3 years ago
This is really cool!
Reply 3 years ago
Thanks!
3 years ago
This actually looks amazing
Reply 3 years ago
Thanks, glad you like it! I was surprised it turned out so well :D
3 years ago
Love this idea and just voted for you. Good luck! :)
Question 3 years ago
Can I mould jello in the lego mould?
Answer 3 years ago
That's a great idea! You totally could.
3 years ago
I love this unique idea i absolute voted for ya my boi
Reply 3 years ago
Thanks, glad you like it!
3 years ago
Oh this is awesome!
I like how you made both a useful mold AND a frosty treat!
AND IT'S LEGOS. YES.
I was obsessed with legos when I was a preteen, and I saw those candy legos that were similar in taste to Smarties candy, but I never really liked them. This here is a lego I would actually enjoy eating! Nice work! :-D
Voted for ya, bruh!
Reply 3 years ago
Thanks! Your comment made my day :D
Reply 3 years ago
Yay! :-)
3 years ago
Love it! I have a Lego crazed family member in for a big surprize. Thanks for sharing.
Reply 3 years ago
That's awesome! Would love to see a picture when you finish it :D
3 years ago
Like you project and excellent video. Question, wouldn’t children be tempted to “eat” their legos and choke on it?
Reply 3 years ago
Use your best judgement when it comes to kids.
3 years ago
Taste the rainbow. Eat your heart out Skittles.
Reply 3 years ago
That's right!
3 years ago
Could these be used to make a hard candy?