A Great Harwood couple ended up having an egg fight when she returned home from a night out with friends.
Hyndburn magistrates heard Robin Thompson was drunk when his partner got home and started an argument.
Thompson, of St Edmonds Street, suddenly picked up an egg and smashed it on her head and then repeated the act three times.
But Graeme Parkinson, defending, said Sandra Doherty had also thrown eggs at her partner.
"It was documented in the custody record that he had egg yolk all over the top of his jacket," said Mr Parkinson.
Thompson, 30, pleaded guilty to assaulting Miss Doherty and causing £500 worth of damage to property belonging to her.
He was remanded on bail for the preparation of a pre-sentence report.
Peter Wild, prosecuting, said Miss Doherty had been contacted and did not want a restraining order as she was hopeful they could reconcile.
He said that after the egg smashing incident Thompson began kicking walls and damaging property.
Mr Parkinson said Thompson didn’t have a defence to the first egg and that constituted an assault.
"There haven’t been any blows but smashing an egg on someone’s head is an assault," he added.