The Wisconsin cheese factory worker charged with kidnapping Jayme Closs after murdering her parents shared his sick obsession with her in a new jailhouse letter, according to a report Monday.

Jake Patterson drew hearts around the 13-year-old’s name in a handwritten note to a friend obtained by Radar Online.

“My brother… got a puppy named ‘Vale’ a couple of weeks before [heart] Jayme [heart] ran away,” Patterson wrote.

The letter continued with ramblings about loving “Mexican food” and “lots of stuff.”

“Chocolate and berries are probably my favorite. Me and Jayme cooked a bunch of stuff,” he wrote. “Cooking is another thing I like doing a lot.”

Jayme was allegedly held captive for 88 days inside Patterson’s cabin in the remote town of Gordon, Wis., before she escaped in early January.

Patterson, 21, is accused of taking the teen hostage after randomly targeting her and murdering her parents inside their home.

“It’s weird,” he wrote in the letter. “I went from never committing a crime or really doing anything bad to doing the worst thing a human can do. Just one big f–k up ha ha.”