Question: When was the chocolate brownie popularized?
About the article "Chocolate brownie", section "Abstract".

Candidate passages:
Brownie Chocolate was a whey-based chocolate drink. 
A chocolate brownie is a flat, baked square or bar developed in the United States at the end of the 19th century and popularized in both the U.S. and Canada during the first half of the 20th century.
The brownie is a cross between a cake and a cookie in texture.
Brownies come in a variety of forms.
They are either fudgy or cakey, depending on their density, and they may include nuts, frosting, whipped cream, chocolate chips, or other ingredients.
A variation that is made with brown sugar and no chocolate is called a blondie.
Brownies are common lunchbox fare, typically eaten by hand, and often accompanied by milk or coffee.
They are sometimes served warm with ice cream (à la mode), topped with whipped cream or marzipan, or sprinkled with powdered sugar.
They are especially popular in restaurants, where they can be found in variation on many dessert menus.
Brownie Brittle was invented by Sheila G. Mains in Palm Beach, Florida, as a part of Sheila G Brands.
Mains had been a commercial brownie baker since 1992, and eventually purchased the telephone number 1-800-Brownie.
The first theme-park that ordered her brownies for sale in their park placed an order for 37,000 brownies.
Eventually, she was baking and selling up to 1.6 million brownies a year.
Among her clients, she was the producer for brownies at Disney World since 1994.
The first incarnation of Brownie Brittle was called "Brownie Crisps," however they did not take off.
The idea for brownie brittle and the crisps came from the hardened drippings that would come off the pans used in her plant, and she developed a new type of process that would only produce crispy brownie edges.
The company relaunched “Brownie Crisps” as Brownie Brittle and the renamed product was first sold in retail stores in April 2011.
It was the first commercial brownie crisp company in the United States.
In 2012 the company received $8 million in sales, and received the “Best New Snack Product” prize at the National Confectionery Sales Association awards ceremony.
Also in 2012 Brownie Brittle was nominated as one of the most innovative new products at the Sweets And Snacks Expo and had sold more than two million bags of the product.
Brownie Brittle also entered a partnership with Weinstein Co. to provide snacks for movie premiers, as well as their Golden Globe and Oscar events.
The flavors of Brownie Brittle are Chocolate Chip, Toffee Crunch and Traditional Walnut. 
The candy bar has changed in make and name since its first iteration.
The first was the "Milo Bar" introduced in the 1990s, which was Milo crumble covered in milk chocolate.
It was dropped in favor of the "Milo" brownie, caramel and Milo balls. 
 Chocolate Hazelnut (red, introduced 2010) Milk Chocolate (purple, introduced 2011) Chocolate Caramel (orange, introduced 2011) Totally Chocolatey (blue, introduced 2011, discontinued 2013)  White Chocolate Brownie (white, introduced 2012) S'mores (introduced in 2014) Varieties.
In September 2011, Kellogg started a flavour campaign between the two then-limited edition flavours, "Totally Chocolatey" and "Chocolate Caramel", to decide which of the two flavours was to be a permanent addition to the Krave brand, through voting on the cereal's Facebook page.
When the votes were tallied on 31 October 2011, "Chocolate Caramel" got the most votes and was later made for general release, though "Totally Chocolatey" was also later re-released.
In 2013, "Totally Chocolatey" was discontinued.
Krave also have an online game as a tie-in with the cereal called "Chocovore Horror".
They are also promoting The Smiler.
In 2012, Kellogg introduced Krave to the North American market in two flavors/varieties: Chocolate (golden brown) Double Chocolate (brown) As of March 2014, Kellogg announced they would no longer be distributing Krave in North America.