Agar Petri Dish Edible Treats Recipe
Agar Petri Dish Edible Treats are fun, science-themed jellies made with agar agar and natural juices. Modeled after microbiology petri dishes, these translucent jelly rounds are perfect for kids' parties, Halloween treats, or edible experiments. They’re naturally vegan, sugar-free, and customizable with colors and fruit, offering a creative way to serve a healthy snack.
- 2 cups 100% fruit juice (e.g., grape, orange, or apple)
- 1½ teaspoons agar agar powder (not flakes)
- Optional: food-grade silicone molds or real sterile petri dishes
- Optional toppings: chopped fruits, berries, or edible glitter for “bacteria” look
Instructions
- Step 1: In a saucepan, pour in the juice and sprinkle agar agar powder evenly on top. Let it sit for 2 minutes to bloom.
- Step 2: Turn the heat to medium and stir continuously until the mixture starts boiling. Continue boiling for 1-2 minutes until agar fully dissolves.
- Step 3: Turn off the heat and allow the mixture to cool slightly for 1 minute. Pour into clean petri dishes or molds, filling just to the top.
- Step 4: If using toppings like chopped fruit, gently drop them into the mixture while still warm to mimic the look of bacterial cultures.
- Step 5: Transfer the dishes to the fridge and chill for at least 45 minutes until fully set.
- Step 6: Once firm, the jelly can be popped out and served immediately or kept covered in the fridge for up to 3 days.
Notes
- Agar sets at room temperature but chills faster and firmer in the fridge.
- This recipe is vegan, gluten-free, and ideal for allergen-free party treats.
- You can add sweetener like stevia or monk fruit if your juice is too tart.
- Use edible decorations like chia seeds or blueberry bits for a realistic lab effect.
- Great educational project for kids learning about science and food.
Frequently Asked Questions
Can I use agar flakes instead of powder?
It’s possible, but you’ll need 3 times the amount and longer cooking time.
Are these treats vegan?
Yes. Agar is plant-based and makes a perfect gelatin alternative.
Can I make these with milk?
Yes. Use plant-based milk for a creamy version, but avoid acidic fruits to prevent curdling.
How long do these last?
Up to 3 days in the fridge, covered. They’re best enjoyed fresh.
Can I reuse real lab petri dishes?
Yes, if they are food-safe and thoroughly sanitized. Or use food-grade silicone molds.