This is a means of transmitting recipes in a condensed text format. This is fun for IRC, twitter, IM, SMS, or any other circumstances where text messages must be reasonably short.

Take my chocolate chip cookie recipe.

.5Csg+bsg+softbtr,1egg,.5TSPbsda+bpdr+vla+salt,.75Cflr,1.5Cqoat,chips,375-400F,6-8min

This means 1/2 cup of sugar, and the same measurement each of brown sugar and butter. Then a 1/2 teaspoon of baking soda, and the same measurement each of baking soda, baking powder, vanilla and salt. Then 3/4 cup of flour, and 1 and 1/2 cup of quick oats. Then chips (chocolate chips are implied), then bake at 375 to 400 degrees Fahrenheit, for 6 to 8 minutes.

Basically, convey the details of the recipe as briefly as legibly possible (at least after briefly learning how to read condensed recipes). You list the ingredients, separating them by a comma. Complex notes are not possible, so you have to be rather inventive.

Use brief uppercase abbreviations for measurements:
C = cup(s)
G = gram(s)
PCH = pinch
TBSP = tablespoon(s)
TSP = teaspoon(s)

For numbers, use decimal format. For example, 1.5 means 1 and 1/2. For fractional measurements less than 1, start with a decimal spot. For example, .5 is 1/2. Including the 0 in 0.5 is unnecessary, as .5 is clear enough.

Ingredient names are also as condensed as possible, and should be in all lowercase to differentiate them from the measurements:
bpdr = baking powder
bsda = baking soda
bsg = brown sugar
btr = butter
egg = egg(s)
flr = flour
qoat = quick oats
salt = salt
sg = sugar
softbtr = softened butter
vla = vanilla

Other ingredients not used in this particular recipe:
bmlk = buttermilk
clam = clams
crm = cream
eggyk = egg yolks
eggwt = egg whites
hbegg = hard-boiled eggs
mayo = mayonnaise
mlk = milk
mrg = margarine
mstd = mustard
ooil = olive oil
wtr = water
xyl = xylitol

You can leave brief notes between the ingredients, such as:
beat
blend
boil
chill
chop
churn
dice
puree
stir
whisk

Steps can be omitted if they're implied as part of the type of recipe. For instance, you stir ingredients to make cookie dough - to try to make cookie dough without stirring the ingredients at all would be ridiculous.

For baking, you can just supply the temperature and time. The temperature is the number followed by either C (celsius) or F (fahrenheit). Use Google Calculator or something similar to convert if needed. Time is equally brief, following by words like hr, min, sec. So 375-400F,6-8min means bake at 375 to 400 degrees Fahrenheit for 6 to 8 minutes.

Now, here's my sweet cream (plainest of plain) ice cream recipe.

2egg,whisk,.5Csgr,whisk,1Cmlk+crm,whisk,churn

This means 2 eggs, whisk them, then 1/2 cup sugar, then whisk again, then 1 cup milk and 1 cup cream, then whisk, and then churn in your ice cream maker.

...Yeah, I like my ice cream to be sweet, but not too sugary sweet.