The new facility has been installed as part of a £75 million investment in Bournville by Mondelez International to make its Cadbury Roses and Heroes assortments and Cadbury Dairy Milk bars. Announced by the company last year, it secures the next generation of chocolate manufacturing at the site.
Javid called on the Midlands to act as an engine for growth, discussing how the government can work with manufacturers to encourage greater inward investment and export more from the UK.
He added: "The Cadbury brand has its history in Birmingham and the new production lines will help to secure its future here too.
"I want every part of the UK to grow and do well but for far too long a lot of it has just been about the South East. The Midlands already has so much going for it with great household names like Cadbury so it has the potential and the people.
"Our long-term economic plan for the Midlands is to make it the engine for growth in the UK. We want to help businesses and support those who want to work hard and get on - adding £34 billion to the Midlands economy by 2030 and creating 300,000 extra jobs."