Father, Ngor Duanghakhon, 65, was making pork soup for lunch at home in Buriram, Thailand after his son, Sakdin, 36, had bought the meat.
But the son flew into a rage when his dad told him he had forgotten to add the staple ingredient in Thai cooking.
Sakdin grabbed an empty bottle and hit him over the head before slapping his mother Pa, 66, when she tried to step in to help.
She ran for help while her son picked up a kitchen knife and repeatedly stabbed his father in a frenzied attack on Thursday morning.
Police arrived and found the son covered in blood calmly lounging in a hammock at the front of the single-storey home.
Officers on Friday took the handcuffed son to the scene to re-enact the crime – and make him kneel down and apologise to his father’s corpse.
Deputy Inspector Col Nitipat Kitichartchai said: “The father volunteered to cook the pork. The son went to drink a some liquor and then wanted to eat the food.
“But the dad said it was not finished, not cooked yet and it will not be delicious if they eat now.
“The son did not want to wait. Then he said he forgot the fish sauce and he became angry.”
The son, who has two brothers, was returned to the scene the next day to re-enact the crime in front of officers and neighbours.
He had to kneel down, apologise and say a prayer next to his dead father.
Col Kitichartchai said the son admitted the murder and has been sent to Amphore Nangrong prison in Buriram to await sentencing.
He added: “It was reported to us that the son had used a knife to stab the father at the home.
“I knew we would have to go to investigate the scene. It is a single storey house. The father was wearing a loin cloth without a shirt.
“He had more than 10 stab wounds on his back, particularly across the left shoulder, and one the deeply penetrated the heart. The smell of blood stained the area.
“I asked the wife how her husband died and she identified her son as the killer. He was found outside the house in a cradle (hammock) with a lot of blood on him but he was not injured.
“He was detained while we investigated the home.”