Orange bitters

Orange bitters are a kind of bitters, a cocktail flavoring obtained from such ingredients as the peels of Seville oranges, caraway seed, cardamom, coriander, anise, and burnt sugar in an alcohol base. Orange bitters, which are not to be confused with the official Angostura aromatic bitters, are currently enjoying a resurgence among cocktail lovers.

Since most bitters are used by dashes or in drops, the amount of alcohol is minuscular, making the alcohol by volume hard to trace. Sometimes they are marketed as non-alcoholic, although they are made from alcohol. Orange bitters aren't usually bitter, but tart, and citrusy. Some cocktails can be bitter, depending on the other ingredients in them.

Orange bitters is also great with

3 minutes
Tuxedo

The Tuxedo is composed of gin, dry Vermouth, orange bitters, maraschino and Absinthe. It's very similar to the imperial cocktail, which adds maraschino to the combination of gin and dry vermouth. Related to the martini, the Tuxedo has had many variations since its inception in the 1880s. The cocktail is named after the Tuxedo Club in Orange County, New York where it was first mixed.

3 minutes
Casino

The Casino is an IBA official cocktail made with gin, maraschino liqueur, orange bitters and fresh lemon juice. The Casino, which appeared in Harry Craddock's 1930 Savoy Cocktail Book, falls into a category of cocktails called Daisies. Each of these drinks includes a spirit, citrus, and a flavored sweetener.

3 minutes
Dry Martini

The martini is a cocktail made with gin and vermouth, and garnished with an olive or a lemon twist. A dry martini is made with little to no vermouth. Ordering a martini "extra dry" will result in even less or no vermouth added. By the Roaring Twenties, it became a common drink order. Over the course of the 20th century, the amount of vermouth steadily dropped.

3 minutes
Manhattan

A Manhattan is a cocktail made with whiskey, sweet vermouth, and bitters. While rye is the traditional whiskey of choice, other commonly used whiskies include Canadian whisky, bourbon, blended whiskey, and Tennessee whiskey. Popular history suggests that the drink originated at the Manhattan Club in New York City in the mid-1870s, where it was invented by Iain Marshall for a banquet hosted by Jennie Jerome.

5 minutes
Chicago Cocktail

The Chicago Cocktail is a brandy-based mixed drink named after the city of Chicago, Illinois. It appeared in multiple cocktail manuals dating back to the 19th century. The main ingredients are brandy, triple sec, and bitters. Some versions do call for the Champagne to be added.