Ophelia Neal, 53, pleaded guilty in Oakland County Circuit Court to bank robbery and explosive charges following the April 6 crime in Macomb County, The Detroit News reported Tuesday.
Neal pleaded guilty in Oakland County because she had been wanted there for violating her parole.
Police said Neal went into the Fifth Third Bank in Clinton Township April 6 and told a clerk she was carrying a bomb in her cloth bag.
Neal fled with an undisclosed amount of cash in a car driven by a man. She was later arrested and police discovered her cloth bag contained two cans of spaghetti sauce.
Neal, who has previous convictions for fraud, marijuana possession and assault, is scheduled to be sentenced Nov. 9 before Macomb County Circuit Court Judge Jennifer Faunce.