Fantastic Feasts: Glowing green Kryptonite ice cream with fizzing toppings

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Mar 21, 2018, 1:02 PM EDT

It’s almost impossible to claim any level of Superman knowledge without at least a basic recognition of the power Kryptonite holds over the Man of Steel. At its most complex, it’s a radioactive mineral from his home planet, Krypton. This substance has appeared in various colors since its original debut in Superman #61 (Nov. 1949) but is perhaps best known as the glowing green crystal-like shards that easily reduce Superman to a mere shell of his normal super-self whenever they're in close proximity.

While I can in no way claim any Kryptonian heritage, I do have to admit that I share a similar super-weakness. But whereas Superman is brought to his knees by a rock, I find myself unable to resist the lure of… avocados.


Mmm. Those deep emerald green globs of smooth awesomeness are the secret to my undoing. Which is why, when it came time to formulate an appropriate weakness-inducing recipe for the upcoming release of the new SYFY series Krypton, my first thought was “avocados!”

My second thought was, "How can I make something truly unique with an avocado that not only celebrates my weakness for this fleshy fruit but also embraces my other weakness — rich and decadent sweets?"

And then it hit me. Avocado ice cream.

Now before I lose you, yes, I know. Avocado ice cream sounds weird, but much like Superman's tendency to wear his underwear on the outside of his bodysuit, it actually makes perfect sense when you stop and think about it. So just how does one go about making avocado ice cream? And, more specifically, how does one go about making it appropriate for the premiere of Krypton?

By making it glow! 

Now, while they do share the same almost fluorescent green color as Kryptonite, I’m pretty sure (depending on where you specifically source your fleshy fruits) that glowing is not a standard feature of most avocados, which is why we’ll be adding a secret ingredient to our version here. On top of that, we’ll make our final product fizz and pop in your mouth as though you’re actually crunching through radioactive material — only with less debilitating side effects like hair loss and horrible disfiguring radiation poisoning and much more fun stuff like super-pucker-sour citric acid and sugar.

Have I freaked you out enough yet?  No?  Excellent!  Let’s get started.

To make your own green glowing Kryptonite avocado ice cream with fizzing green topping, you will need:


  • 2 medium ripe avocados
  • 1 whole lime
  • 1 cup whole milk
  • 1 cup sugar + 1 teaspoon, divided
  • 1 teaspoon citric acid
  • ¼ teaspoon baking soda
  • ½ cup heavy cream
  • ½ cup coconut cream
  • Neon green food coloring
  • 2 B-2 vitamins, crushed
  • 1 teaspoon coconut extract

You’re also going to need:

  • Medium pot
  • Wooden spoon
  • Knife and cutting board
  • Large bowl
  • Food processor
  • Zester or small grater
  • Ice cream maker
  • Plastic food grade wrap
  • Small Ziplock bag
  • Mortar and Pestle or an alternate way to grind up B-2 tablets
  • Plastic resealable Tupperware tub
  • Blacklights (optional, but makes everything way more dramatic!)

Start by first slicing your avocados in half. 


Remove the pits and scoop out the meat. Transfer this to a bowl and mash into a thick paste using your wooden spoon.

Slice your lime in half and squeeze both halves over your mashed avocado and mix well to combine.

Using your zester or small grater, zest the outside of your lime rinds and set aside for later. We’ll be going back to this in a bit.

Over medium heat, combine your milk, heavy cream, coconut milk and your sugar. 

Stir constantly until the sugar is completely dissolved. The point here is to ensure that the sugar is completely dissolved but not to overheat the milk, so whatever you do, do NOT let the milk boil. You want it to just come to a bare simmer. 

Once the sugar is completely dissolved, add your crushed B-2 vitamins.

Mix in your grated lime zest and any food coloring you'd like at this point. I added a few drops of neon green to just really kick up the electric color, but this is completely optional. 


Allow to simmer (but NOT boil) for about 2 minutes. 

At the two-minute mark, mix in your avocado paste and continue to simmer for an additional 2 minutes, stirring constantly.

Remove from heat, allow to cool, and add in your coconut extract.

In your food processor, blend your mixture until completely smooth. You should end up with a thick, creamy liquid. 

Transfer this creamy avocado awesomeness to your ice cream maker and follow the manufacturer’s directions to churn up a batch of the creamiest, smoothest, most interestingly complex flavored soft serve ever (mine took about 30 minutes to achieve scoopable perfection!).

While that’s churning, let’s make our topping.

In your Ziplock bag, combine your teaspoon of sugar with your teaspoon of citric acid and your ¼ teaspoon of baking soda. Add a few drops of green food coloring and knead the bag to distribute the coloring while you also mix the ingredients. 

What we’re doing here is a little culinary science magic. The citric acid and baking soda on their own won’t do much, but when they come into contact with the moisture in the ice cream (and later the saliva in your mouth) they react by chemically changing, forming sodium ions, citric acid ions, carbon dioxide, and water. This chemical reaction creates a fizzing and popping sensation. The sugar just makes it taste better.

Boom.  Knowledge drop.

By now your ice cream should be soft serve ready. Scoop up two healthy portions and pop into the bowl of your choice. 

Sprinkle on a little of our fizzing green topping, turn off the overheads, flip on the black lights and be ready to be brought to your knees by our very own smooth, creamy, avocado-lime-coconut-Krytponite-in-a-cup glowing ice cream. That’s right…it’s GLOWING!

The ice cream on its own won’t glow, which is why we added the crushed B-2 vitamins. B-2, otherwise known as riboflavin, glows bright yellow under a blacklight. When exposed to the ultraviolet (UV) range, molecules within the riboflavin get so excited they emit their own wavelength of energy as light. Who knew making ice cream was also going to include a science lesson? 

If soft serve isn’t your thing and you’d like your ice cream a little harder, simply transfer it to your Tupperware tub. Press a layer of plastic wrap directly on the surface of the ice cream before sealing the tub, and pop it into your freezer for at least 4 hours.

One spoonful of this stuff and I’m guessing you’ll agree with my theory on why Superman wears his underwear over his suit. I’m convinced someone said, “Hey, I’ll share this ice cream with you, but first you have to wear your underwear on the outside.”  Someone get DC on the line. I swear this should be canon.

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