No, that's not an orange; it's a lime. An orange-colored lime! It's a rangpur lime, which is a hybrid of a mandarin orange and a lemon.
While not a true lime, the Rangpur lime is highly acidic and is a wonderful substitute for regular limes due to its lime-like zestiness and its orange-like juiciness. The flavor of the lime is said to taste a little bit smoky.
Originally from India, the Rangpur lime found its way to the US in the 19th century. The gin company Tanqueray has a Rangpur-infused gin called Tanqueray Rangpur. Rangpur lime trees are popular as ornamental trees, but the fruit is also great for cocktails, lime curd, ceviche
, and any recipe calling for lemon or lime juice. Zingerman's
sells a wonderful rangpur lime syrup.
Here are some recipes to try with rangpur limes
Rangpur Lime Curd
Rangpur Lime Marmalade
Rangpur Lime Punch
(Image: Flickr user m.paoletti - thanks!)