- Welcome back y'all.
Wilmer Valderrama, Scott Hoying and I
are all geared up for and ready for the next guest
(audience cheering)
here's what happened last time she was here.
(transition whooshing)
- Now
(Kelly screaming)
We're on the clock.
Come, go, come go!
- [Kelly] Okay go, go, go, go!
(balls cascading)
- Nice, nice, Now come on over here, come back.
And now we're just gonna wait until, what we're doing
is we're allowing the liquid nitrogen to kind of boil.
So it's going from the liquid state
and it's gonna go up into the gas state.
(bottle pops)
(Kelly screaming)
(audience cheering)
- My God I am loud.
I know where my children get it.
Please welcome back UT professor,
and explosive science entertainer,
Dr. Kate Biberdorf, better known as
(audience cheering)
Kate the chemist, welcome back.
- Hi.
- Nice to have you.
- Thank you so much.
I, I feel less threatened
like life threatened with this one.
So this is Wilmer, this is Scott.
So what do you have planned for us today?
- We are making liquid nitrogen ice cream,
because I promised your team I would not
make as big of a mess as last time
(Kelly laughing)
Y'all, There were ping pong balls everywhere.
Like all over the place. It was awesome.
- Wait, so you can eat that? That's okay?
- Well you can eat the ice cream we make
with the liquid nitrogen.
You cannot ingest liquid nitrogen on its own.
- Yeah, that's just interesting right there.
That knowledge, right?
(audience laughing)
that's kinda...
- Don't wanna do that. That'd be bad.
- Yeah, that's weird Okay. Okay. So what makes it different?
- Well, we're using liquid nitrogen.
- Okay.
- And so liquid nitrogen acts like a stabilizer
in ice cream.
And so it, normally when you have water
it's gonna connect with itself
(audience whoops)
like this and it's gonna make
- You're a magician as well?
- And now I have paperclips!
So if each one of these paperclips is a water molecule
they connect into this really big long chain.
So that's like regular water, right?
- [Kelly] Okay.
All right. So now here, you here.
- Thank you.
- You're welcome
- I wanted it! Just kidding, it's okay.
- But we add liquid nitrogen, it stops that.
So it, we can't make the big long chain
- [Kelly] So it interrupts the chain
- It does. And so we just have these like little pieces.
Okay. This tastes like a big ice cube.
These little guys taste like velvety creamy deliciousness.
- Oh, I want this one.
- [Kate] Yeah. Here you go.
- Yeah. Yeah. This one's mine.
Okay. So how do we make it?
- Are you ready? Okay, so
each of you step forward.
So in, in your bowl you already have your ice cream base.
So there's some sugar and some cream
- Kinda looks like eggnog, but yeah
- Essentially, yeah.
There's some egg yolks in there as well.
- And so now you each have your own special flavors.
And so what are your flavors?
You have a card, what do you have?
- Er, mine is Wilmer's sea salt, caramel Valderrama.
- Beautiful, beautiful, Kelly?
- Mine is Kelly's Mr. Cookie Dough it all.
(guests laugh)
And Mr Know It All. I get it.
- I like it. That's cute. Okay Scott?
- Mine's Scott-ch chocolate Hoy-reo.
- Ooh, I like it, yours is gonna be good!
- That's pretty good. Okay, add your stuff.
So your ingredients are right here.
Wilmer. Just add like a pinch of your salt.
- So we're not using these yet, right?
- Not yet. You can put them on.
- I'm excited to put them on, is really what it is.
- It's cute, it's cute. Put'em in.
- So how much do we put in?
- Oh, for you? All of it, right?
- Yeah. Bleugh!
(Kate laughing)
- All good, all good.
And then make sure you get your liquid in too,
you wanna add your caramel for you.
- Do I put like all of this?
- As much as you want?
- Okay, I feel like it's gonna be a lot.
- [Kate] It's up to you. It's your ice cream
- Is this vanilla?
- This ice cream is so on brand for me, you know.
(audience laughing)
- Oh that's cute.
(Kelly laughing)
I love it.
- [Kelly] We planned it.
- [Kate] Let's stir.
We're stirring here.
- Stir. We're stirring.
- [Kate] I'll take that. You don't need that anymore.
- Okay, oh, I might have put too much vanilla.
It's gonna be a situation.
- [Wilmer] Is there a technique to the stir?
- Yeah, I mean you just kind of go in a clockwise rotation
- Oh, I'm doing it wrong
- You can go the other way if you want to.
- [Kelly] Totally.
- [Kate] Whatever you want.
- Okay. Okay. Okay.
- Are you ready for the liquid nitrogen? The fun part.
- So this is the goggles, right?
- Yes. So now I promise my lawyer I'd make you
put your equipment on. So gloves and goggles on.
- We will, okay.
I feel awesome with this. I love the lawyer.
- And now (Kate straining)
I'm gonna use this one
- Shoot, I kept a daytime
- [Scott] So strong.
- So this is liquid nitrogen.
It's really, really cold.
It's 77 Kelvin or -196 degrees Celsius.
I'm gonna add to yours first, Kelly.
- Do you want me to stir while you're doing it?
- I do. Yes please.
- Okay
- [Kate] And so do you guys have a guess of what negative...
- [Kelly] Oh my God, it's a potion.
- Isn't that cool?
- Potion!
(audience laughing)
(Kelly cackling)
- [Kate] Scott, I'll do yours first.
- The intelligent way
- Stir stir stir. Stir, stir, stir.
- It's a potion
- Wilmer, stir, stir, stir. Stir, stir stir.
- Okay. Okay.
- Okay. Keep stirring.
- [Kelly] Oh no. Yeah, you gotta keep stirring.
It gets weird.
- [Kate] Keep stirring. Yeah, 'cause otherwise it's gonna
freeze, right?
- You can't see it, it's like a mystery ice cream.
- We're trying to prevent those long chains
of water molecules of forming.
So need you to stir.
- Okay, the cookie dough is fighting me
- This the right velocity?
- The cookie dough is one hundred percent fighting me.
- [Kate] Yes you're doing great velocity, good science.
- [Scott] Thank you.
- We're coming through
Ooh, it's working, it's working, how's yours?
(Spoons scraping)
- Mine's cracking
- Yours is good - Oh my Gosh! It's like hard.
- It is, it is. Can you scoop it out and kind show 'em?
That's exactly what happens.
- [Kelly] Yeah, I can try.
- Is it forms kind of this like, hmm!
Yummy, yummy!
- So I can eat this?
- Yeah. Do you want more or are you good?
- No, I'm good. Can I eat this though?
- Yeah, you can try it. Yeah, try it.
- Okay.
I made some good ice cream.
- [Kate] Good, it's good - [Wilmer] Do I need more?
- [Kate] Yeah, you need some more.
(audience applauding)
- That is really good
- Stir, Wilmer, stir
- I'm just gonna double check, everybody,
just gonna check.
- See. no, you need a little bit more too.
Ooh, it's so cool.
(gas fizzing)
- [Kelly] Oh my God, mine's really good.
- [Kate] Stir, stir, stir.
It's so cool.
- You guys might is really good.
It's interesting, the texture, that's all I'm saying
- It, like, traps air bubbles in a very unique way.
And so ice cream, depending on the research you read
air can be in there like 30 to 50%.
And here it's just totally different,
Lots more dense - I just love that
you can actually have,
you're like digging for it.
- [Kate] It's cool.
- This is good
- [Kate] Let me see yours.
- A little hard.
- [Kelly] Okay before we go. - [Scott] Tastes good
- Looks really good
- Before, yours is gonna, yours is chocolate Oreo right?
- Yeah its...
- [Kelly] How do you go wrong with that? Yeah.
- So good.
- So Kate, before we go to break
tell us about your new podcast.
- Oh yeah.
Okay. I have a brand new podcast.
I'm partnering with NPR in KCUR.
- [Kelly] Love.
- We have a podcast called Seeking A Scientist
and we're essentially turning scientists into rock stars.
We're giving them the credit they deserve.
They need the standing ovations.
I'm highlighting all their cool research.
It's my dream job and I love it.
(audience cheering)
- I love it. I think it's so cool too
to highlight what they're doing
and get kids excited about that too.
- Absolutely. All this research is so cool.
We're gonna talk about zombie fungus.
We're talking about how you can reverse aging,
- there's actual research - Are you watching
The Last Of us?
- [Kate] I haven't started yet.
- Fine, I'm disappointed.
- I'm so sorry.
- Just kidding. (audience laughing)
I love that y'all are like taste testing each others.
- [Kate] How is it?
- He's like "have a bite"
- Oh, you're shooting a show?
(audience laughing)
Oh, we were having desserts, Sorry.
- Be sure to download, like and share Seeking A Scientist
wherever you get your podcasts.