Danielle Watson, 29, told police afterwards: "I know I am a violent person, but I didn't think I was capable of being this violent."
The High Court in Glasgow heard that her victim, 49-year-old Edward Bennett, suffered horrific wounds to his head, neck, chest and abdomen.
Watson, who is slightly built and under 5ft tall, will be given a life sentence for the murder. Judge Lord Turnbull will determine next month how many years she must spend behind bars before being eligible for parole.
During a sustained and brutal attack on Mr Bennet, Watson inflicted a catalogue of injuries which included, black eyes, bleeding on the brain, 18 rib fractures and broken bones in his neck. Watson had also stamped on father-of-four Mr Bennett, impressions of her footprints were visible on his body.
She strangled him with a black scarf and rammed two scouring pads down his throat blocking his windpipe.
Yesterday Watson admitted murdering Mr Bennett, a neighbour and friend, at her home in Crowlin Crescent, Cranhill, Glasgow, on November 6 or 7, last year.
The court heard that in the early hours of the morning Watson texted her cousin saying: "I need sum where 2 run just now I've done summit awful."
When she was asked what she had done she replied: "murder."
Lord Turnbull deferred sentence on Watson until next month at the High Court in Edinburgh.