But the fact that porridge is enjoyed by people at other times of the day has led to a lengthy court battle over the name of a new cereal.
Aimia Foods wanted to call its new product for the billion-pound-a-year cereal market "Porridgebreak".
However, Weetabix objected, saying Porridgebreak was a commonly used generic phrase for eating the Scottish delicacy during a break at work and so did not constitute a trademark.
Last year, the UK Intellectual Property Office, which rules on trademark disputes, sided with Aimia Foods claiming customers would not know the term. But Weetabix appealed and has had the decision overturned, thwarting the bid to launch the new brand.
In a written judgment Iain Purvis QC, who ruled on the dispute, said: "Many people do eat porridge in the morning either during a break from work or in a break between travelling to work and actually working."
British porridge sales hit £208 million last year, up 9% on 2010 and almost double the position in 2005.