She stood outdoors and spoke to employees of Brown Sugar Bakery on 75th Street in the Greater Grand Crossing neighborhood.
Brown Sugar's founder Stephanie Hart said Harris wanted to support a small business, and the South Side bakery was on her friends' list of suggestions.
"I'm freakin' out still," Hart said.
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Illinois' Lieutenant Governor Juliana Stratton and Cook County State's Attorney Kim Foxx joined her there.
"I was happy to join her at Brown Sugar Bakery in Chicago as we share a passion for supporting women entrepreneurs and ensuring our small businesses thrive," Stratton said. "There was only one thing we didn't agree on-she ordered German chocolate cake and I went for the chocolate cupcake!"
Employees said Harris asked about the business and how they've been doing during the pandemic.
"It was an awesome feeling to be in such powerful female presence," bakery employee Sha Hines said.
"She could have gone to a million other places, but she came here, and I'm grateful for that," said Tyera Adugba, another bakery worker.
"Just seeing how down to earth she is, coming to a bakery on the South Side of Chicago, I felt empowered," employee Mianca Strode said.
The workers also sent her off with trays filled with caramel, lemon and strawberry cupcakes.