Tips and Techniques for Frothing Milk

Frothing milk is sometimes referred to as both foaming and steaming, although all three are not quite the same. Milk that's prepared for any type of hot drink should always be foamed, even if that foam is comprised of the tiniest of bubbles that are barely noticeable.

The oxygen that causes the micro-bubbles and foam to appear gives the milk a delectably, sweet taste, both rich and full flavored.

Drinks such as lattes use milk that is heated and steamed, with just the smallest bit of foam, while frothing milk is most often done for various kinds of cappuccino. Other popular heated drinks include café au lait, espresso macchiato, and different types of mocha flavored drinks.

What You'll Need for Frothing Milk

1. Cold milk
2. Cups
3. Source of steam, such as a steam wand
4. Stainless steel pitcher (frothing pitcher)
5. Thermometer
6. Towels

Or, simply use an espresso machine that will do the majority of the work for you. Espresso machines will contain a steam wand that nearly doubles the volume of the milk, creating a frothy foam to appear. Many are available in a reasonable price range, while some models are rather pricey.

When using a steam wand for frothing milk, it should never be near the surface of the liquid, which will create bubbles that are too large. But, if it's too close to the bottom of the pitcher or cup, not enough air will be drawn into the liquid to create the right amount of frothiness. Get in the habit of gently swirling the pitcher in a clockwise motion, causing a whirlpool effect, and helping to create a more even texture throughout the milk.

Interestingly enough, the more you practice frothing milk and the better you become at holding the pitcher in precisely the right location, you won't need to move it at all, except to compensate for the change in the liquid's volume. You know you've got just the right spot when the steam itself causes the whirlpool, which is basically done by holding the pitcher evenly and level, but while keeping the wand slanted ever so slightly near one side of the pitcher.

After you've reached your desired texture and temperature, slowly move the steam wand down further into the milk, distributing the foam as well as the overall temperature.

Temperatures for Frothing Milk

The temperature used when frothing milk will have a distinct effect on the taste of the drink, and will inevitably require a bit of patience in order to master the practice. Most importantly, the colder the milk, the better the results will be, provided you also use a cold pitcher as well. The frothing thermometer will take all of the guesswork out of trying to determine the exact temperature, which is particularly helpful for burgeoning coffee aficionados.

Remember, milk that is lower than 150° Fahrenheit will retain all of its original, milky flavor, invariably taking away from the true intended taste of a coffee based drink. Alternately, milk heated to above 160° Fahrenheit will lose every bit of its taste, allowing the coffee to be the main, and often overpowering, flavor of the drink.

Milk heated to over 170° Fahrenheit will probably taste scalded, or have a burnt flavor that will overwhelm the taste of the espresso, causing it to be far too bitter to enjoy. For stronger drinks, think of the milk as an accoutrement, used for accentuating the flavor, and taking the edge off the taste.

When frothing milk, always turn the steam wand off 10° before your ideal temperature is reached as the milk will continue to heat for a few seconds. Many frothing thermometers have a helpful feature to rely on, a colored band that clearly indicates the 140° to 160° Fahrenheit degree mark, making it easier to see when to stop the frothing process.

How Much Foam Do You Need?

A good rule of thumb to follow: frothing milk should be done until the milk has about doubled in volume. If you seem to have too much foam, or if the bubbles on the milk's surface appear too large, there are two things you can try to rectify the situation.

First, begin by firmly, but gently tapping the pitcher on a hard surface, such as the kitchen counter, until the bubbles disperse. If your milk contains too much foam resembling soap suds, it may be best to start over and try again. Gently stirring the milk or swirling the pitcher in a circular motion may also eliminate those pesky, larger bubbles.

Types of Milk

The types of milk used for frothing depends on one's personal taste, although there are some differences between the common choices of milks. Non-fat is the easiest to foam, however, it doesn't offer the fuller flavor of either 2%, also called partially skimmed, or whole milk. Soy milk is known as the most difficult of all to froth, but it isn't an impossible feat. 2% milk is probably the most often used as it does provide the creamy taste and is also relatively easy to froth.

Milk Frothing Tips

Cappuccino: One of the most well known of all the heated beverages, cappuccino is the perfect blend of frothed milk and coffee. Using an averaged sized cup of five to seven ounces, one third should be filled with the shot of espresso, one third steamed milk, and finished off with one third foam.

Espresso Macchiato: Macchiato simply means "marked," and in this case refers to the dollop of foam decorating the drink's surface. Using a one-to-one ratio, half of your cup should consist of espresso, while the other half will be filled with the frothed milk, and of course any flavorings such as caramel or mocha.

Latte: This Italian drink is extremely popular in many parts of the world. Both the latte and its French version, café au lait, are made from half dark, roasted coffee, and half steamed milk. Neither are very frothy, although they do have a hint of small foam floating atop the mixture.

Mocha: Mochas are made by coating the bottom of the cup with chocolate syrup, usually one ounce per 12 ounce cup, then brewed espresso, the lightly frothed milk, all topped off with a generous portion of whipped cream, and perhaps some chocolate shavings or powder sprinkled atop that.