“Cake Boss” Buddy Valastro is sparing no details of his horrific bowling accident, but says the gruesome injury’s left him more grateful than ever … for his family and the doctors who saved him.

Jersey’s other Boss joined “360APROKO Live” Tuesday to give his account of the freak bowling accident, telling us he’s got a long road to recovery ahead due to severe tendon, nerve and muscle damage to his right hand.

Word of warning … if you’re enjoying a piece of cake — or any food — right now, finish up before watching Buddy’s description of the pinsetter machine impaling his hand.

As we reported … Buddy was bowling with his fam on their at-home alley and tried to fix the malfunctioning pinsetter. Buddy said the “blunt force” he felt as a metal rod repeatedly rammed through his hand was by far the worst pain he’s ever felt.

He also revealed it wasn’t just his hand that was severely injured ? … and gushed about the amazing job his family did to free him from the evil machine to get him to a hospital.

As for the road to recovery … the “Cake Boss” told us it’s gonna be a long one — but he said it’s giving him a newfound appreciation for the medical pros doing miraculous work to fix his hand.

Sounds like renowned orthopedic surgeon Dr. Michelle Carlson can expect a Christmas card, and probably a cake too!