So it wasn’t just a shmear campaign.

The city’s biggest bagel maker will serve 50 weekends in jail after pleading guilty yesterday to grand larceny for pocketing $369,000 in payroll taxes.

Helmer Toro, founder of H & H Bagels, must pay back a total of $500,000, a pile of dough that factors in all his tax arrears, interest and penalties.

The bagel big admitted in Manhattan Supreme Court that he withheld $337,000 from his workers’ paychecks between 2003 and 2009 and simply kept the money.

Toro admitted taking the remainder of the money by registering 89 of his workers under a succession of new shell companies. That allowed him to pay their unemployment-insurance taxes under the lowest rate, reserved for brand-new businesses.