Hey everyone, Caffeine Man here and today
I'm gonna be going over several brewing
methods and how each one affects the
caffeine level. I'll be going over the
cold brew, hot brew, French press, drip
coffee, immersion and other brewing
methods such as Chemex and the Keurig.
Also I'll be discussing other factors
that contribute to different caffeine
levels such as light roast vs. dark roast,
different kinds of beans, grind
levels and much, much more.
Coming right up.
INTRO: C *THUD  M *THUD*
*LIGHTNING STRIKE*
Hello again, thanks for
joining me. Today I have another
informative video for you and it's
actually a subscriber encouraged video.
I planned on doing this video a little bit
later on but thanks to their question I
realized that it's and important topic that
I should probably cover sooner rather
than later. About five weeks ago, I asked,
"How much caffeine do you drink?"
I'll include that link in a card above
in case you want to watch it. In that
video I went over the caffeine content
of coffee, tea, energy drinks, soda and
much, much more. So feel free to check it out. I also ended up getting a comment and a question
from a subscriber named "That ain't bad". He, or she, asked if I could do a video explaining
different roasts and brewing methods and how they affect the caffeine content. I gave them a very brief
response, because I love to respond to
all my caffeine lovers comments, and let
them know I planned on doing a video. Today is that day so thank you to That Ain't Bad
for your question. Now that simple
question is a good question and it's a
big question. If we were to take a look
at an energy drink can or even a soda
bottle, you'll easily see how much
caffeine is in it, but when it comes to
coffee, the numbers are drastically
different across the board. Part of the
reason why I started this channel was
because I wanted to keep people informed
on all things caffeine related and when
it comes to coffee, it is very temperamental.
Why do I say that? Because an average cup
of coffee has between 80 and 120
milligrams. If you watch many of my
previous videos, you'll know I say that a
lot because it's a very common stat. Then
I go on to say that a Dunkin Donuts
8 ounce cup of coffee has 140 milligrams;
McDonald's 109; Starbucks 155;
So why all the differences in such a large range?
Well, there's a lot involved and I'm
about to go over all of it.
Also, I'm not going to be talking about
the best method and how it makes the coffee taste.
I'm gonna be sticking to what's
important to my channel and what my
viewers want to know, and that is "How do
these coffee brewing methods affect the
caffeine in the coffee?" So there are
several factors that affect caffeine
which include brew time, dwell time, water
temperature, grind level, roast level, bean
type and blend, and all of these have a
significant effect on the final
extraction of caffeine. So where do I
start? Let's start off with basically how
coffee is brewed. Coffee is brewed with
hot water around 93 degrees Celsius or
200 degrees Fahrenheit. Hot water
dissolves the beans more easily and
speeds up the diffusion so you can get
more flavor faster, as well as extracting
everything else faster, including acid
and caffeine. Now that we know that, let's
talk about the opposite method, which is
cold brew. When we look at cold brew, it
takes a longer amount of time to extract
the flavor, as well as the caffeine,
because it doesn't have the heat causing
the faster extraction. Cold brews usually
taste smoother or less bitter because
the cold water doesn't extract as much
caffeine or acid out of the bean, as hot
water would. Cold brews tend to be 60%
less acidic than hot brews and a
cold brew takes anywhere between 12 and
24 hours to completely brew. When I did
the research for the Dunkin Donuts cold
brew I found that it had between 25 to 50
milligrams less, from small to large. It's
because the extraction is slower with
cold water, than hot water and the same
applies across the board for all the
coffee companies. The caffeine count will
always be slightly lower on the cold
brew than the hot brew. Now let's move on
to espresso. Now when most people say the
word espresso, they think of a small
drink which is much stronger than coffee,
but in truth espresso is actually a
brewing method of coffee, so it really is
just a stronger coffee because it's made
with coffee beans. But let's talk more
about this brewing method.
First off, you need finely ground coffee beans for
espresso the finer the grind the more
surface of the coffee is exposed to
extract the flavor and caffeine. This
fine grind is then in tightly packed in
hot water is forced through the grinds
at extremely high pressure for about 20
to 25 seconds. The top of the beverage
has a crema which is produced by
emulsifying the oils in the ground
coffee which does not occur
any other brewing methods.
Depending on the bean used, an espresso averages
between 45 and 75 milligrams per ounce
making it the highest caffeine level of
all the brewing methods.
Next we have several other brewing methods which are
similar to each other.
There's the drip method with the
old-fashioned coffee brewer and,
man talked about fashion. Look at this thing. Nice
 little designs on there
and then there's also immersion which is most
commonly done with a French press or
a cool futuristic R2-D2 French press!
There's also Chemex, which is not shown
here, but it's also a similar drip method.
Now although all these brewing methods
will produce a different body to the
coffee and different flavor,
it doesn't affect caffeine count too much.
Most coffee machines will brew four
to five minutes...
although in this case, it might take a little
longer
When you're using the French press most people keep it immersed for 4 to 5 minutes and
sometimes 6 minutes and that's based on personal preference.
*BEEP* *BOOP* BEEP* BEEP* *BOO* *BEEP* That's right R2!
As for a Chemex the recommended time is 4 to 5 minutes. Therefore all these coffee brewing
methods are brewed for around the same
amount of time, 4 to 5 minutes. So your
drip coffee is going to come in at about 80
to 120 milligrams, which on average is
about 100 milligrams for 8 ounces,
so you're getting about 12 to 13
milligrams per ounce. A French press will
get you anywhere between 80 and 135
milligrams per 8 ounce cup, which
averages out to about 110 milligrams for
an 8 ounce cup, which comes out to about
13 to 14 milligrams per ounce. As for a
Chemex it has about the same amount as
drip coffee, therefore all of these
methods will produce around the same
amount of caffeine.
*BEEP* *BOOP* BEEP* BEEP* *BOO* *BEEP*
Overall the longer that you brew the coffee with hot water,
the more caffeine you'll extract out of it, although slight.
I do specify hot
water because cold brews do have less
caffeine although they are brewed much,
much longer, that's because the hot water
extracts it faster. Additionally there will
still be a lot of people out there that
say cold brew has more caffeine than a
hot brew, but if you just look at the
numbers, everything that's posted from
Dunkin Donuts, Starbucks and all the
other companies, you'll see that the cold
brew
have less caffeine. So for those of you
that say cold brew has more caffeine, it
could be because the water to coffee
ratio is less. There are plenty of
companies out there that do a cold brew
concentrate. But for your average cup of
coffee the water to coffee ratio will be
the same as a hot coffee which will
result in a lower caffeine count. Now
before moving on, I wouldn't do this
video justice if I didn't talk about the
Keurig.
Keurig first started selling their Brewers to offices in 1998. As it grew in popularity they began selling
brewers for home use in 2004. In 2006,
Green Mountain Coffee Roasters acquired
Keurig and its sales soared even higher. In
2012, Keurig's K-cup patent expired, making
K-cup up sales difficult with far
more competition on the market, but also
making the machine far more desirable
for its customers by having so many
coffee options. Then just recently, in 2018, Keurig Green Mountain merged with Dr Pepper Snapple Group.
So why did the
Keurig become so popular? This is because it
always gives you a good, and some would say great, cup of coffee every single time,
in under a minute.
And let's face it, we live in a need it now world.
Just when four to five minutes
became too long to wait for coffee, Keurig
comes along and makes a machine that
does it in less than one minute with
very little cleanup. So how is it brewed?
Well, Keurig actually found a happy
medium between two different brewing methods; your standard drip method and an espresso type method.
Hot water is forced
through the K-cup, but definitely with
not as much pressure as an espresso
machine, but enough to pump it through, in
less than a minute. What I like to call a
helping hand to push the water through
the coffee, as opposed to letting gravity
take its course. So how does that affect
the caffeine? Keurig claims that an 8
ounce cup of coffee using the standard
2 ounce K-cup would yield between 75 and
125 milligrams of caffeine. They also
have extra bold K Cups which have 30%
more ground coffee in them than the
regular K cups, which increases the
caffeine count to about 150 milligrams
for an 8 ounce cup. Therefore not too
much different than all the other drip
methods and given the fact that there
are so many companies that make K cups
now, it's all going to be brand dependent.
Next let's look at a slightly
controversial topic, as well as commonly
misconceived topic. And that topic is
light roast versus dark roast,
and I'm gonna try to explain it in a way
that isn't confusing to anyone...
I hope. So here's the key thing to
remember. During the roasting process a
coffee beans caffeine is not affected.
Wait... what did he just say?
That can't be
true can it?
and a lot of you may be saying the same thing. How can that be true? Doesn't cooking it longer or
shorter affect the caffeine? Science has
proven that the caffeine in a coffee
bean remains quite stable during the
roasting process and that roasting a
coffee bean does not affect the caffeine.
What is affected, is its size. When coffee
is roasted, it loses about 90% of its
water content and during this roasting
process, a being loses its mass and the
density of the bean changes beans.
Beans that are roasted longer are less dense but
larger, so let's take a look at this picture.
I'd like to take a second to
thank sweet Maria.com for use of their
amazing roasting image. They allow reuse
when given credit and a link to their
website. I've included a link to their
website in the description box below and
I highly recommend you check it out for
more detailed information about the
roasting process. They do an amazing job
explaining it. As you can see from the
picture, it starts off small in its raw
form. As it is slowly roasted the coffee
bean gets darker and larger. A dark
roasted coffee bean is roasted sometimes
only 20 to 30 seconds longer than a
light roasted bean and within these
seconds, becomes a little darker and
slightly swells in size. You can clearly
see from the first image to the last
image that the beans have changed in
size. So what does this all mean? It means
if you measure by scoops, which most
places do, light roasted coffee will have
more caffeine than dark roasted coffee,
because more beans are used. However if
your coffee is being measured by weight,
like some specialty coffee shops do, then
the dark roast is going to have more
caffeine because more beans are used
based on its size. So the argument of
what has more caffeine, light roasted
beans or dark roasted beans is null and
void. An individual bean has about 6
milligrams of caffeine in it. Whether
it's light roasted or dark roasted
doesn't matter for its caffeine.
It's only for flavor and boldness. It's all
a matter of how you prepare these coffee
beans. If they're measured by scoop light
roast has more caffeine because more
beans are used. If it's measured by
weight your dark roast is gonna have
more coffee beans and thus more caffeine,
so be sure to bring up those facts in
your next argument of light roast versus
dark roast, so that person can be just as
amazed as you are right now. Next I want
to briefly talk about the grinds.
As mentioned with espresso, finer grinds
give more surface area for flavor and
caffeine to be extracted. Water reaches
the surface area and saturates the grind
with ease, as there's a greater contact
area. This is why espresso, as well as the
hot water being forced through with high
pressure, has the highest caffeine
content of all the brewing methods. A
French press will usually use a medium
grind so that the grinds are more easily
strained, but given its immersion time it
has the second highest caffeine content,
just beating out drip coffee. Drip coffee
also uses a medium grind but you can
switch up your grinds with a coffee
maker because of the filtration system.
Some coffee makers do come with a bold
option which brews the coffee slightly
longer to give it a more bold flavor and
given the slightly longer brew time,
will have slightly more caffeine and
comes in just a few milligrams less than
the French press. And lastly, one more
quick fact that affects the caffeine are
the beans used. 70% of the world's coffee
comes from Arabica beans and Arabica
beans have about 6 milligrams of
caffeine in them. The other kind of bean is a Robusta bean.
A Robusta bean will have about
twice the amount of caffeine than
Arabica bean. Given that it has twice the
amount of caffeine, caffeine is very
bitter, which will make the coffee more
bitter, which is why it's not as widely
used as Arabica beans. And that just
about does it. If you found this
information useful, feel free to hit the
like button and if you want to stay
informed on all things caffeine related
hit the subscribe button. I post new
videos every Tuesday night, and if you
think other people will be interested in
this information feel free to share it
on your social media platforms as well.
Thanks again for watching
*BEEP* *BOOP* BEEP* BEEP* *BOO* *BEEP* R2 thanks you too!
 
