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A customer at a Starbucks in Louisiana was in for a shock on Sunday when her latte came topped with the mark of the devil, drizzled in caramel syrup.

Baton Rouge teacher Megan Pinion was so offended when she was handed two drinks with a satanic pentagram and 666 etched in latte foam that she took to Facebook with an image of the beverages.

Taking to the Starbucks Facebook page to express her outrage, Pinion criticized the professionalism of the company’s employees.

“I unfortunately can't give the young man’s name who served it, because I was so appalled that I could not bring myself to look at him,” Pinion wrote in her post, according to the Louisiana Advertiser. “I am in no way judging his beliefs or dis-meriting his beautiful artwork, I am however judging his lack of professionalism and respect for others. I am a teacher in the public school system and if I were to present a child of atheist or pagan believers with a Christian art project I could be sued in a heartbeat. I am of Catholic faith and would love to share in my beliefs daily. Fortunately I have enough common sense to present myself with professionalism and follow an ethics code. Perhaps that could be suggested to that particular location.”

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The response from Starbucks was serious, and the company issued an apology to Pinion.

“[Sunday] was the first we heard of it when she posted on our Facebook page,” Starbucks social media spokesman Tom Kuhn told the Advertiser. “We reached out to her through social media and apologized. We’re taking the complaint seriously. We’re not sure who served her or what kind of beverage it was. It looks kind of caramel-ish in the photos.”

Kuhn was asked if the incident would change Starbucks’ policy on foam art.

“I don’t know; I guess it could,” he replied.