A "cookie angel" has bought 1,000 boxes of a Long Island Girl Scout's (search) goodies in hopes of sweetening her recent unpleasant encounter with the New York Police Department.

"Gracemarie Louis seems like a really nice girl who got caught in a situation," said Manhattan investment banker Ernie Dahlman, 35, of Dahlman Rose & Co. (search)

He's donating the $3,500 worth of cookies to the Island Harvest food program — on behalf of New York's Finest.

On March 5, Gracemarie's dad, Hoi Louis, was ticketed by a police officer on a Brooklyn street because he was helping his daughter sell cookies.

"A police car pulled up and a cop screamed, 'Get over here! Police!'" recalled 13-year-old Gracemarie from Troop 3019 in Hicksville, L.I.

"I was afraid because I didn't think it was the police," she said, recalling recent news reports of violent criminals posing as law-enforcers.

But the forgiving girl later said she had no hard feelings. "I think it was a misunderstanding," she said.

Dahlman reasoned that the police officer who ticketed Gracemarie's dad was just doing his job.

"There is no cop out there who says, 'I'm going to bust this guy for selling Girl Scout cookies,'" he said. "If I can show support of the cops and of a nice girl, that's great."

"That's amazing!" said a stunned Gracemarie when given the good news Sunday while delivering yet more cookies in her Bethpage neighborhood.

"That beats all my records."

She had already sold 600 boxes by the time of the incident in her old neighborhood of Williamsburg, Brooklyn.

New York Post readers bought another 200 from her last week.

Dahlman's generosity brought her total to 1,800.

He's making a lot of kids happy, Gracemarie said, noting that her troop hopes to sell enough for a group trip to Disney World.

The lesson, she added, "is that there are still a lot of people who care — and this guy really cares."

Her grandma agreed.

"He's not a cookie monster," Grace Taras said. "He's a cookie angel."

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