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B1 中級 英語 12:25 Educational

Why we cook food in oil

Adam Ragusea · 4,720,516 回視聴 · 追加日 3週間前

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B1

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00:00

this video is sponsored by audible why

00:02

does nearly every recipe start with

00:05

dropping a film of oil into a pan ever

00:08

wonder what would happen if you just

00:10

didn't hey let's find out actually first

00:12

let's do it the normal way just for the

00:14

sake of comparison a little olive oil in

00:16

a hot pan Sprouts in and almost

00:19

immediately you start to see this nice

00:21

golden color emerging generations of

00:24

people raised on boiled brussels sprouts

00:26

grew to hate them and that's

00:28

understandable you got a brown they're

00:30

filled with starches and sugars and

00:32

proteins that brown up real nice if you

00:34

give them enough time and enough heat

00:36

these took 6 minutes to get very Brown

00:39

and tender and quite tasty if I do say

00:41

so myself now let's try to do the exact

00:43

same thing again but with no oil are

00:46

they going to stick to the pan without

00:48

any oil in there not really not if you

00:51

keep them moving here's our first bit of

00:53

Browning and check out how different

00:55

that looks it's a patch of black with

00:58

really clearly defined borders

01:00

very different from the broad smudge of

01:02

golden brown we got with oil there's a

01:05

few little brown spots showing up on the

01:07

cut sides but much smaller and more

01:09

localized than the overall Browning we

01:11

got with oil and one other thing I

01:13

noticed is that they're cooking very

01:15

very slowly we're at 6 minutes now which

01:18

is how long it took to cook the previous

01:20

batch all the way through and these are

01:22

still hard on the inside nowhere close

01:25

to being tender after 11 minutes I'm

01:28

giving up if I cook these any longer

01:29

longer they're going to burn here they

01:31

are side by side oiled Sprouts are on

01:33

the right and on the unoiled Sprouts you

01:36

can see how hard I have to push my fork

01:38

in there they cooked for nearly twice as

01:41

long and they are still not done also

01:43

their flavor wasn't nearly as good so

01:46

what's going on here well keeping the

01:48

food from sticking to the pan is I think

01:50

not the most important reason that we

01:52

cook with oil oil or any kind of liquid

01:55

fat has a much more significant role to

01:57

play in that pan let's do it again with

01:59

the Imaging camera I got some broccoli

02:02

this time same basic deal that film of

02:04

oil is serving as what they call a

02:07

thermal interface the pan surface is

02:10

flat and rigid the food is not so only

02:14

teeny little bits of the food are

02:16

actually making physical contact with

02:18

the metal the oil essentially reaches up

02:21

from the bottom of the pan and grabs

02:23

hold of those bits that are floating

02:25

just above the surface and because oil

02:28

is a tremendously good conduct C of heat

02:31

energy from the pan is transmitted into

02:33

more parts of the food than the pan

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