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A method of preparing such drinks is to make a small quantity of strong, hot espresso, dissolving the required sweetener/flavorings in the hot liquid and then pouring this directly into a cup of ice cold milk. Pre-packaged iced coffee is available as a grocery item in several countries.
Iced coffee may be served already chilled, or poured hot over ice. Because sugar does not dissolve readily into cold liquids, it must be added either directly to the hot base, or to the finished product in the form of syrup.
Variations by country 
In Australia, iced coffee is commonly served with ice cream and whipped cream. The drink may also include syrup, cream, cocoa powder and/or coffee beans. The result is something like an un-blended milkshake.
Some commercial varieties of iced coffee are made from real coffee while others contain only coffee flavouring.
Iced coffee has been sold commercially in Australia since the late 19th century in the form of a syrup, an example of which is Bushells Coffee And Chicory Essence. Iced coffee is commonly available as a prepackaged, ready to consume drink.
In South Australia Farmers Union Iced Coffee has outsold Coca-Cola and is one of the state’s biggest brands. The brand is available in other states. Jacaranda Iced Coffee enjoys similar popularity in south east Queensland.
In Canada, the popular Tim Hortons coffee chain sells iced cappuccinos, known locally as Ice Capps. The coffee drink mix comes to the Tim Hortons stores as a thick black syrup which is mixed at 3 parts water to one part syrup in a slurpee machine. The frozen coffee drink is then blended with cream at the time of service (or blended with milk, or chocolate milk upon customer request). The Ice Capp can also be prepared as a Supreme, which includes a flavour shot, whipped topping, and either caramel or chocolate syrup. There is also a Brownie Supreme, which is made with chocolate milk, and mixed with bits of brownie. This is then topped with whipped topping, and finished off with more bits of brownie scattered on top. The chain has also recently introduced traditional iced coffee to its Canadian menu in addition to its U.S. menu.
In Chile, iced coffee is called café helado (iced coffee).It is very popular in the summertime. Café helado is composed of espresso or coffee powder, chantilly cream, sugar, cinnamon, vanilla, chocolate or vanilla ice cream, manjar (dulce de leche) and ground almonds or nuts.
In Germany there are different types of Eiskaffee (coffee with ice cream). The most widespread form is a flavoured milk drink similar to Australian iced coffee, generally spelled as Eiscafé (from the French café) and available in German coffeehouses and in Eisdielen (ice cream parlours). However, this type of iced coffee is rarely available in German supermarkets. The most widespread form of iced coffee in supermarkets is a canned version from a variety of brands with different flavours such as Cappuccino and Espresso. This iced coffee is very similar to the canned iced coffee in the UK and in the case of some brands (particularly Nestlé) actually the same product.
In Greece one of the most popular coffees is a variation of iced coffee called Frappé, invented by Dimitrios Vakondios in 1957. It is stirred in an electric mixer and thus has a foam on top. Milk is optional. It became well known during the 2004 Summer Olympics in Athens, when many tourists became fond of it and an article on the Los Angeles Times was written about it.
Frappe is served in Greece and Cyprus.
Iced coffee has become a popular beverage in India over the last few years. It consists of Nescafé instant coffee mixed with cold milk in a blender, producing a thin, coffee-flavored smoothie or often mixed with vanilla for icy thick experience. South Australians, especially in Adelaide, are also known for this. A more upscale version is popular in the espresso bar chains Barrista and Cafe Coffee Day. This is made with a shot of espresso and cold milk, similar to a latte.
In Italy, Nestlé introduced the Frappé coffee under its Nescafé Red Cup line, with the name Red Cup Iced Coffee. Many Italian coffee bars serve "caffè freddo," which is straight espresso kept in a freezer and served as icy slush. In the Salento region of Puglia, this was perfected by brewing the espresso freshly, adding the desired amount of sugar and finally pouring it in a whiskey glass filled with ice cubes right before being served, known as Caffè in ghiaccio, coffee on the rocks. Affogato (espresso poured over a scoop of vanilla gelato or ice cream) is also served, typically as a dessert.
In Japan, iced coffee (アイスコーヒー aisu kōhī ) has been drunk since Taishō period (around 1920s) in coffeehouses. It is served with gum syrup and milk. Cold tea was already popular, so it was natural to drink cold coffee. In 1969, UCC Ueshima Coffee released canned coffee, which made coffee available everywhere. Today, canned liquid coffee is consumed both cold and hot.
Iced coffee is also popular in the Philippines, and it is served in a number of cafés. Notable chains of Philippines coffee shops include Coffee Overdose, Figaro Coffee, Starbucks Coffee, Old Manila Coffee House and Fiorgelato Cafe. For a more elaborate version, a scoop of ice cream is added on top. There are also Ready-to-Drink Coffee in cans. One up and coming brand is Rosewood Kaffe Chilled Black Coffee which is made from the famous Philippine barako coffee that has stronger aroma and flavor.
Saudi Arabia 
Iced coffee is a very well known drink in Saudi Arabia; its popularity is almost that of hot coffee. Recently, iced coffee has become a preferred drink among young Saudis especially in the very hot summer - temperatures sometimes reach 50°C (122°F).
Packaged iced coffee is gaining prominence in stores, featuring brands both foreign and domestic. For example, iced coffee (Nadeccino) has been introduced by a dairy company called NADEC, and flavored versions are offered by the firm Al aRabiya.
Thai iced coffee is brewed using strong black coffee, sweetened with sugar, heavy cream (or half-and-half) and cardamom, and quickly cooled and served over ice. Some variations are brewed using espresso. Thai iced coffee can be served with whipped cream on top for a layered effect, and garnished with cinnamon, vanilla and/or anise. It is a common menu item at Thai restaurants and works well after a spicy meal.
United States 
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Long popular among coffee enthusiasts in the U.S., iced coffee is quickly gaining popularity among the general consumer audience as evidenced by the fact that it is available in mass food franchises such as Dunkin' Donuts and sold bottled in grocery stores. Iced coffee is prepared many different ways, though traditionalists[who?] maintain that true iced coffee is cold brewed using one of a number of ways. Cold brew coffee contains up to 70% fewer bitter acids than heat brewed coffee, making for a smoother, richer tasting coffee drink.
For years, consumers made an iced coffee concentrate by soaking ground coffee and chicory with water in a mayonnaise jar. The next day, the grounds would be filtered out. The result was a very strong coffee concentrate that was mixed with milk and sweetened. Today, a device called a Toddy Maker can be used. In a plastic basket, consumers soak their favorite coffee blend in water overnight. The following morning, the basket is stacked atop a glass jar, and the plug is removed from the bottom of the basket. The liquid coffee drips into the jar. The coffee is refrigerated and is good for a week. Any unused coffee can be frozen in ice cube trays.
Many coffee retailers ignore the taste benefits of cold-dripped coffee and simply pour hot coffee over ice and serve. Iced coffee enthusiasts believe this is a poor way to make iced coffee.[who?] In the 'to go' iced coffee world, there are countless grab-n-go products such as Frappuccinos, which are premade, presweetened and typically shelf stable. These are typically made using heat-brewed coffee.
Vietnamese iced coffee is drip coffee with condensed milk served over ice. In Vietnam, it is typical to use a phin filter or French press to brew the dark-roasted beans often used to make iced coffee. It is generally a sweeter, heavier drink than its Thai counterpart.
See also 
-  A Vibrant Food Culture