Butterfinger is a candy bar

Candy bar

A chocolate bar is a confection in bar form comprising some or all of the following components: cocoa solids, cocoa butter, sugar, milk. The relative presence or absence of these components form the subclasses of dark chocolate, milk chocolate, and white chocolate. In addition to these main...

 made by Nestlé

Nestlé

Nestlé S.A. is the world's largest food and nutrition company. Founded and headquartered in Vevey, Switzerland, Nestlé originated in a 1905 merger of the Anglo-Swiss Milk Company, established in 1867 by brothers George Page and Charles Page, and Farine Lactée Henri Nestlé, founded in 1866 by Henri...

.

The bar consists of a flaky, orange-colored center—somewhat similar texture to crisp caramel

Caramel

Caramel is a beige to dark-brown confection made by heating any of a variety of sugars. It is used as a flavoring in puddings and desserts, as a filling in bonbons, and as a topping for ice cream, custard and coffee....

, with a taste similar to peanut butter—that is coated in compound chocolate.
Butterfinger was invented by the Curtiss Candy Company

Curtiss Candy Company

The Curtiss Candy Company was founded in 1916 by Otto Schnering near Chicago, Illinois. Wanting a more "American sounding" name , Schnering named his company using his mother's maiden name....

 of Chicago, Illinois, in 1923. The company held a public contest to choose the name of the candy. The name is a slang term used to describe a clumsy person, often in sporting events to describe an athlete who can't hold onto the ball.