A complicated area, at least it seems to be, so some basics.
Google video was having some problems with processing and
rendering quality, now fixed. Hopefully the quality of this should now be
fine.
A little video to try and show the rights and wrongs.
Note, it can be useful for control to either rest your hand on the drip tray,
or the back of the jug lightly againt the steam wand, to help give extra
control. My main problem was a camera stuffed up my nose while trying to
foam milk <laugh>
Yes I did bleed the wand beforehand, this is just a short blast into another
container to get the small amount of water (about 1/4 of a tespoonfull) out
of the wand, so the steam is dry. Also this was done using a single hole tip
(Expobar Tip). For tips with 2 or more holes a more vertical orientation
of the steam wand may be required to prevent one of the holes breaking the
surface and forming large bubbles.
Before you view the video, it might be helpful to read some of
the basic principles
1. Cold Milk (from the fridge is fine, no need to go to any special lengths
to super chill it or anything)
2. Full Fat milk seems to work best (well UHT works even better, but most
people don't like the taste), lower fat content milks don't seem to give as good
results.
3. Decent Milk jug, not too wide not too tall and the right size for the
amount of milk, simply speaking small for small quanitities and large for large
quantities. You usually see steel jugs for milk foaming and I suppose it's not
critical, but thats what I use.
4. Wand tip to one side and fractionaly under the surface of the milk, you
want to draw in air, but not form large bubbles.
5. If you have a 1 hole tip, have the wand at a slight angle to the surface
of the milk, this will prevent roiling (movement) of the surface from
exposing and submerging the tip of the wand. It also helps to spin the milk into
a nice whirpool. Tip: don't have the firing end of the tip
too close to the wall in the direction the steam is going, you tend to cause
roiling and unneveness on the surface and less swirling!
If you have a 2 ,3 or 4 hole tip, you don't want the wand at an angle, as
your much more likely to periodically expose the uppermost hole and cause
bubbles, so a more vertical orientation seems to work best (but still to one
side of the jug)
The temperature you should foam milk to is a slightly more difficult one. I
don't use a thermometer now...I used to many years ago but not anymore. This
isn't because I can tell what the temperature is, it's because I don't really
care what a thermometer says. It's about the temperature you prefer your lattes,
cappas or hot chocolate, etc. Too hot, it's unpleasant and burns the
tongue, plus the milk separates out a bit. Often though I find the standard
offerings a bit too cool. So you foam it to the temperature you and the
people you are making it for prefer.
How much to foam it...well for a cappa, I foam it plenty and
then bung it straight in For a Latte, foam it not so much and
pour it in with a bit more refinement, to try and bring some of the crema
colour/layer to the top. Also although i'm poor at latte art, you never know, I
might get lucky. Normally though I've stretched (foamed) the milk far too
much and far to long for latte art, but thats the way I prefer it and gives a
nice silky drink right to the bottom of the cup.
You're trying to get the milk to swell, thicken whatever you want to call it
and increase the amount of air, without any visible bubbles (it's called
micro-foam). The milk ends up looking like single cream, but of course a lot
lighter. The Micro-foam seems to serve two functions, it gives a rich silky
texture and the increase in surface area because of all the bubbles spreads and
explodes the flavour across the tongue.
Once you have foamed the milk, it's a good idea to finish the drink
preperation, by making your espresso shot for the latte etc.. and every 15
seconds or so swirl the milk, this keeps the whole thing incorporated and gives
it a glossy appearance.
If I am making a hot chocolate, I actually add the (high quality) chocolate
powder to the cold milk (just sprinkle it on top), and when foaming the milk,
the swirling action mixes it and the micro-foaming process drags it under the
surface and incorporates it.....my kids have no complaints.
There are some very cheap and very expensive milk jugs out there, some are
better for latte art than others...the choice is yours, but I think it's best to
be economical to start with, until you have lots of practice.
Is it hard....no, anyone can do it. I have read that the time of year, brand
of milk, feed of the cows even the breeed of the cows can make a huge difference
to whether milk can be foamed, even how fresh it is (e.g. a few days
old). I have found that none of the above to be that important,
the success or the failure to microfoam is really down to technique.
I soon will be publishing some more ideas on using
sugar (Courtesy of Paul L) and simple decoration of drinks that anyone can do,
plus some stuff for young and old kids.