The chain is trialling the breakfast menu at four restaurants, including London's Leicester Square. It will roll out nationally from 17 November.
The menu includes products such as apple fries, pancakes, a Big Breakfast burger and a sandwich to rival McDonald's Egg McMuffin.
Burger King will support the changes with an ad campaign, including TV activity, following the menu's national launch.
A spokeswoman for the chain admitted it needed to improve its standing in the breakfast market.
Previous attempts to establish Burger King as a breakfast provider have been unsuccessful. In 2007, it expanded its breakfast menu to include items such as a Cumberland Sausage Butty and bacon roll to appeal to British diners.
McDonald's is also running a heavyweight campaign, spanning TV and press, to promote its morning opening hours, breakfast food and coffee.
In 2008, KFC made its first foray into the breakfast market with the KFC A.M. range. Participating restaurants open at 6am, four-and-a-half hours earlier than usual.
Breakfast's value
- Just over 548m consumers visited fast-food restaurants for breakfast between August 2008 and August 2009, a 1.4% drop year on year.
- Fast-food breakfast sales were worth £1.28bn over the same period, a 1.8% fall from £1.31bn for the year ending August 2008.
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