The budding entrepreneur loaded her wagon with sandwich biscuits and mint thins and within 45 minutes had sold everything, earning a tidy $120 (£70) for the Girl Guides.
With a smile and a winning product, Elina Childs worked her way up and down the crowd lining up along red carpet outside Nova Cannabis.
She said Thursday that they sold out very quickly. Even cars were stopping on the street to buy her cookies.
On Wednesday, people across Canada celebrated the legalization of marijuana by lighting up on sidewalks and in parks. Smart cookies, both of them.
"So we decided, why don't we go out there and sell cookies", he said.
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"The Girl Guides thought it was an innovative and positive idea", said Childs, noting that the organization said it would only be an issue if Elina was selling the cookies inside the shop.
The pair walked up and down the lineup, which stretched around the block the entire day.
"It was well received", said Seann Childs.
A Girl Scouts Brownie - and budding entrepreneur - knew exactly where her best sales would come from.
"Good on her and her family for thinking of it", Edmonton commissioner Heather Monahan told the Canadian Press.
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The 38-year-old was four-under through 11 holes before his lone bogey of the day, but was delighted with his opening effort. Brian Harman came up with the lowest round of the week, an eight-under 64 putting him in contention on four under.
People came for the marijuana, but thanks to an ambitious 9-year-old and her father, they got a nice treat in addition.
As Canada legalised recreational marijuana use across the country this week, one little girl was an unexpected victor. "We saw that as an opportunity to get out there and teach her a little about what cannabis is".
"She didn't quite understand what the big deal was", Childs said.
"We talked about ... what it was and what it means for people who want to use it and people who don't want to use it", he said.
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Another witness said the victims didn't realize that a train was coming their way because the fireworks were too loud. Why was it organised there? The site of the accident is almost 465 kilometres north of New Delhi .