(CNN) When a woman's trip to the grocery store to get a cake decorated goes viral, it's usually for the wrong reasons. Not this time.

Over the weekend Lisa Aldrich posted to Facebook a photo of a birthday cake she bought for her sister at a Michigan supermarket, Meijer. The white-frosted cake is adorned with pink icing on the edges and a not-entirely legible "Happy Birthday Mandy" written on top.

Picked out a cake at Meijer. Asked bakery-looking-employee if she could write on it for me. She said she would, and... Posted by Lisa Sarber Aldrich on Sunday, November 29, 2015

Aldrich explained in the post she asked a "bakery-looking employee" to write on the cake, so she did.

"I looked her in the eye and said thank you before I even looked at the cake," Aldrich wrote. "After looking, I nervously laughed and headed to check out -- it didn't really matter to me that it looked so bad -- I thought people would think it was funny."

But cashiers and other employees, including a manager, gave the cake a serious once-over before Aldrich discovered what made the funky writing so special.

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