A sticky-fingered blonde swiped at least two bags from customers at touristy Midtown hot spots in a single day, authorities said.

The suspect, a woman in her 20s or 30s, first snatched a knapsack off the chair of a 75-year-old man inside Junior’s restaurant on Broadway near West 45th Street about 4:30 p.m. Sept. 19, cops said.

She made off with a number of the victim’s bank cards but did not use them to buy anything, police said.

The thief struck again about an hour later at Carmine’s restaurant on West 44th Street, stealing a 47-year-old woman’s bag from her chair that had bank cards and cellphones worth about $1,500, authorities said.

The suspect was last seen wearing all black clothing, police said.