<PAGE>
                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  FORM 10-Q/A

    Quarterly Report Under Section 13 or 15(d) of the Securities Exchange Act
                                     of 1934

(Mark One)
[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934

                  For the quarterly period ended March 9, 2002

                                       OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934

           For the transition period from             to
                                          -----------    ------------

                                   ----------

For the Quarter Ended March 9, 2002               Commission File Number 1-11165

                         INTERSTATE BAKERIES CORPORATION
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)

           DELAWARE                                     43-1470322
-------------------------------             ------------------------------------
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

12 EAST ARMOUR BOULEVARD, KANSAS CITY, MISSOURI                        64111
-----------------------------------------------                      ----------
  (Address of principal executive officers)                          (Zip Code)

                                 (816) 502-4000
              ----------------------------------------------------
              (Registrant's telephone number, including area code)


              ----------------------------------------------------
              (Former name, former address and former fiscal year,
                         if changed since last report.)

                                   ----------

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports) and (2) has been subject to such
filing requirements for the past 90 days.

                      Yes [X]                        No [ ]

     There were 50,824,745 shares of common stock, $.01 par value per share,
outstanding on April 2, 2002.

<PAGE>
This amends Item 6(a) of Interstate Bakeries Corporation's Quarterly Report on
Form 10-Q for the quarter ended March 9, 2002.

                                    PART II

ITEM 6 - EXHIBITS AND REPORTS ON FORM 8-K

     a)   Exhibits filed with this report:

 EXHIBIT NO.                       DESCRIPTION OF EXHIBIT
 -----------                       ----------------------
    3.1                            Restated Certificate of
                                   Incorporation as amended

     b)   Reports on Form 8-K

          None

                                 **************

                                       1
<PAGE>

                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                           Interstate Bakeries Corporation
                                       -----------------------------------------
                                                   (Registrant)

DATE: April 19, 2002                   /s/ Charles A. Sullivan
                                       -----------------------------------------
                                       Charles A. Sullivan, Chairman
                                       and Chief Executive Officer

DATE: April 19, 2002                   /s/ Frank W. Coffey
                                       -----------------------------------------
                                       Frank W. Coffey, Senior Vice
                                       President and Chief Financial Officer

                                       2
<PAGE>
                                 EXHIBIT INDEX


EXHIBIT
  NO.                         DESCRIPTION OF EXHIBIT
-------                       ----------------------
 3.1             Restated Certificate of Incorporation, as amended