The Italy international had never scored via his head for the San Siro outfit, but was glad to tick that box in front of Milan's home fans.
Balotelli's 43rd-minute opener was his 14th of the season, and he also assisted Giampaolo Pazzini for Milan's third.
The charismatic 23-year-old claimed he was pleased with his first header in the red-and-black stripes.
"I had scored with a header in every team I ever played for, including Italy, so I had only been missing Milan. Today I broke that taboo," Balotelli told Sport Mediaset.
He added on rumours of a rift in Milan's camp: "The locker room is united and the coach is helping us to be a team unit. Anything that is said outside is of no interest to us."
On his own turbulent private life, Balotelli claimed he is happy - after meeting his daughter Pia for the first time during the week.
Balotelli fathered the child with ex-partner Raffaella Fico, with DNA tests proving he was the father in February.
"I keep my private life, the joy and the pain, to myself. It is not something I want to discuss publicly. All I'll say is that I am happy," he said.
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