Cardiff-based SA Brain bought the chain Coffee #1 last year.
It comes as new figures show Brains' sales are up nearly 4% in its pubs.
Brains believes there is potential in the coffee market and plans a chain of about 50 outlets over the next three years in south Wales and the south west of England.
The family-run brewery employs about 2,000 people.
Last year's profits are up 6% against what the company described as "a tough economic backdrop".
In autumn 2011, Brains bought Coffee #1, which comprised 15 high street shops in south Wales and the south west of England, and since then, it has opened three more.
Brains chief executive Scott Waddington said: "The research suggests that the coffee market is going to continue to grow at 5, 6, 7% for the next five years, which is pretty much what it's been doing for the last five years.
"Coffee in the UK, despite more and more places opening, still has a long way to go to catch up with more developed markets, like the US."
Equity analyst Sam Hart said Brains' decision to diversify into coffee shops was "probably partly a reflection of very tough conditions in the on-trade [bar and pub sales] beer market".
"The on-trade is under pressure from a combination of pressure on consumers' disposable incomes, rising alcohol duties and the increased availability of relatively cheap beer at the supermarket chains," he added.
Mr Hart said the growth in the coffee shop culture in the UK could be viewed as Americanisation.
"Obviously coffee has been ingrained in culture in the US for many years and this appears to be spreading to the UK and other developed markets," he said.
"Many people view coffee as an affordable luxury on which they are prepared to spend, despite pressures on their disposable incomes."

The 22-year-old won the BBC's Women's Footballer of the Year Award in 2015 before joining Arsenal from Liverpool.
She helped the Gunners win the Women's FA Cup at Wembley in May 2016 and was recently awarded the African Women's Player of the Year Award.
She also played for her country at the 2015 Women's World Cup in Canada.

Salman Ramadan Abedi, 22, detonated a homemade device in the foyer of Manchester Arena following an Ariana Grande concert on 22 May.
The five-minute hearing was adjourned until 1 December, pending the police investigation.
Twenty-two people were killed in the arena attack.
No members of Abedi's family were present at court, which was sitting at Manchester Town Hall.
A full inquest will be heard once the police investigation into the attack has been completed.
The court heard Abedi died of "multiple injuries" when he detonated an improvised explosive device.
He was later identified by genetic markers and his bank card that was found nearby, the court heard.
The inquests for the victims were opened with a minute's silence on 9 June and adjourned until November.
Coroner Nigel Meadows said the victims' inquests, at Manchester Civil Justice Centre, would be adjourned until 24 November and this was a "holding date" which could be moved if the police investigation was still ongoing.
The hearing on 9 June was shown a photograph of each of the victims and told of their injuries. Those who died were aged between eight and 51.
A map of where 19 of those killed in the foyer was also shown to the hearing.  The court heard a further three - John Atkinson, Georgina Callander and Saffie Roussos - died later in hospital.
Some of those who died were standing very close to the bomber, with others as far as 20m (66ft) away.
A further 116 people were injured in the attack.
Wales' largest independent brewer is planning to open about 30 coffee shops over three years as it diversifies from its traditional pub business.
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An inquest into the death of the Manchester suicide bomber heard how he was identified by DNA, fingerprint and dental records.