The company also said it was seeking to expand and would, for the first time, open for breakfast from 7.30am. The reveal follows a period of financial strain.
In 2013, C&B reported a pre-tax loss of £1.1m for the year to 30 April 2012. According to managing director Ed Gardner, the business was once again profitable.
All-day dining popularity
Snacks and platters were only available at C&B sites from 3pm but the increased popularity of all-day dining led to the development of the offer and is in line with expansion plans.
Dishes on the new menu include West Country lamb shank with spring greens; Hereford minute steak with garlic butter; and home-made mini cinnamon doughnuts with lemon curd and chocolate dipping sauces. The vegetarian offer includes grilled field mushroom burger and spinach risotto.
Breakfast will consist of H.Forman and Son smoked salmon with scrambled eggs and a full English breakfast.
Gardner said: "We have worked closely with Nellie Nichols, who has helped us to create a menu that is seasonal, while being simple and has great emphasis on [high] quality ingredients.
Number of difficult years
"It is significant that we unveil this new menu at a time when, after a number of difficult years, the business has moved back into operating profit.
"Having completed a number of refurbishment schemes on the core estate during the past 24 months, the business is actively looking for new opportunities to grow through either new sites or acquisitions."
In 2012, the City of London-based operator rebranded to C&B Bars and overhauled its Mason's Avenue site at a cost of £1m.