Making Ice Cream - with Liquid Nitrogen

[Dave KG]

Okay, if anyone decides to try this at home, I take no responsibility for it! :lol: But today in the lab, we made some more ice-cream with liquid nitrogen to cool... Worked really well, tasted great! :thumb:

So - first off we needed some liquid nitrogen. Basically this is just ait thats cooled to -200degC so it turns into a liquid (air is something like 80% nitrogen), so nothing toxic!:

http://img289.imageshack.us/img289/4212/p7310014ui7.jpg (http://imageshack.us)

Now, we took 1pt of milk, 1pt of doublecream and a punnet of strawberries and blackberries, added into a metal pan:

http://img289.imageshack.us/img289/7580/p7310015xq3.jpg (http://imageshack.us)

This was blended quickly with the food blender:

http://img403.imageshack.us/img403/9687/p7310016kl7.jpg (http://imageshack.us)

Now the fun bit - time to freeze the ice-cream. Liquid nitrgen was added to the pan with hte blender on - small amounts in stages so as not to form a big ice block:

http://img403.imageshack.us/img403/2286/p7310017eq0.jpg (http://imageshack.us)

http://img312.imageshack.us/img312/2364/p7310018fg7.jpg (http://imageshack.us)

after five minutes the mixture was starten to thicken and get cold:

http://img403.imageshack.us/img403/6295/p7310019ka5.jpg (http://imageshack.us)

But still more nitrogen was added in small amounts...

http://img312.imageshack.us/img312/619/p7310020zq2.jpg (http://imageshack.us)

http://img403.imageshack.us/img403/8425/p7310021sf7.jpg (http://imageshack.us)

It was getting there now:

http://img308.imageshack.us/img308/2136/p7310023uy2.jpg (http://imageshack.us)

After about twenty minutes of slowly adding around a litre and a half of liquid nitrogen the ice-cream was ready:

http://img312.imageshack.us/img312/3708/p7310026ci5.jpg (http://imageshack.us)

Et voila...

http://img403.imageshack.us/img403/6546/p7310027gq8.jpg (http://imageshack.us)

[GearHead_1]

My family does this also. I really need to know what a punnet translates to on this side of the pond though.:cool: I get bonnet and boot but haven`t heard punnet.

[Jen@autogeek]

hahahahaha Never seen that one before. cool :)

[jaybs02]

My family does this also. I really need to know what a punnet translates to on this side of the pond though.:cool: I get bonnet and boot but haven`t heard punnet.
You are kidding right...
Do many people in your neighborhood keep liquid nitrogen lying around???

If so I`m glad I live here in NY :lol:

"J"

[GearHead_1]

You are kidding right...
Do many people in your neighborhood keep liquid nitrogen lying around???

If so I`m glad I live here in NY :lol:

"J"

No but years ago I was a Chem Student. Some of my friends actually went on a did something with it. I get it from them.

[Dave KG]

My family does this also. I really need to know what a punnet translates to on this side of the pond though.:cool: I get bonnet and boot but haven`t heard punnet.

Punnet is just the small plastic tub that strawberries are sold in over here - there`s about 300g of strawberries in the punnet I used, it was a small one. :)

[Surfer]

oh my god that looks so creamy and yummy, how does it taste? May have to do this :cool:

[Dave KG]

oh my god that looks so creamy and yummy, how does it taste? May have to do this :cool:

Tasted great! :) Only thing you have to watch for is heavy metals in the nitrogen dewar, as they will be toxic. But the nitrogen itself is non-toxic, air is something like 75-80% nitrogen.

[theRIAA]

you lost me at "air thats cooled so it turns to liquid"

[kaos]

My guess is that a liter and a half of liquid N2 would cost significantly more than a quart of ice cream... but that`s just my analytical side coming out :bubba

Looks like a lot of fun though :)

[C. Charles Hahn]

My guess is that a liter and a half of liquid N2 would cost significantly more than a quart of ice cream... but that`s just my analytical side coming out :bubba

Looks like a lot of fun though :)

Other than an educational institution or lab, where would one even GET liquid N2?