Maxwell James and his wife Clare James, both professional chefs, thought that they were being HP sauce in place of something a little more authentic at the Ilchester Arms in Abbotsbury.
Late that evening, James came back to the pub. He said: "I went round the back of the Ilchester Arms and tried to get into the kitchen. Then I realised it was all locked up and pretty secure and I couldn't get in.
"I thought, 'Enough was enough and I would sort it out later'. So I left and, of course, I was promptly arrested by the police who were waiting for me on the street."
James was given a six-month conditional discharge by Weymouth magistrates and ordered to pay £50 compensation and £25 costs.
The argument over whether brown sauce was served or not has never been solved as the pub has since changed hands.