This Halacha is an excerpt from our Sefer
Buy me here or on Amazon.com
The Chabad custom is to abstain from eating Matzah from thirty days before Pesach, beginning on Purim. [Others have the custom to avoid eating Matzah from Rosh Chodesh Nissan. Others only abstain from eating Matzah from the night before the Seder, which is the night of the 14th. According to all opinions, it is forbidden to eat Matzah on the day of the 14th of Nissan, Erev Pesach.]
Summary: [includes Q&A]
The Chabad custom is not to eat Matzah starting thirty days before Pesach, which is from Purim and onwards. One is to avoid eating Matzah even if it is a Kefula, Nefucha, non-Shmura, or machine-made Matzah. It is disputed amongst Poskim if one may eat Chametz Matzah. Egg Matzah which has a strong taste of egg or fruit juice may be eaten. One may eat cooked Matzah, such as Matzah balls and the like.
Q&A on eating Matzah within 30 days
According to our custom, may one eat Matzah Kefula or Nefucha within thirty days before Pesach?
No. One is to avoid eating Matzah even if it is possibly Chametz, such as a Kefula or Nefucha. However, there are opinions who allow eating such Matzah until Erev Pesach, even for those who avoid Matzah starting thirty days beforehand.
According to our custom, may one eat non-Shmura Matzah within thirty days before Pesach?
According to our custom, may one eat machine made Kosher-for-Pesach Matzah within thirty days before Pesach?
According to our custom, may one eat machine made Chametz Matzah within thirty days before Pesach?
Some Poskim rule that one may eat machine made Chametz Matzahs. Others rule that one is to avoid eating even machine made Chametz Matzahs. Practically, one may be lenient if he is particular to only eat handmade Matzahs on Pesach, in which case one may eat machine made Chametz Matzahs up until the night of the 14th.
According to our custom, may one eat Gebrochts within thirty days before Pesach?
If the Matzah is cooked in liquid, such as Matzah balls, it is permitted to be eaten within the thirty days before Pesach. This applies even if the Matzah balls are made from Kosher-for-Pesach Matzah flour.
According to our custom, may one eat egg Matzah [Matzah Ashira] within thirty days before Pesach?
According to our custom, may one eat Matzah dipped in wine and the like within thirty days before Pesach?
It is disputed amongst Poskim whether Matzah dipped in wine is defined as Matzah Ashira, and hence may be eaten on Erev Pesach. Practically, one may not do so, and the same would apply for those accustomed not to eat Matzah starting thirty days before Pesach, that this should be avoid starting thirty days before.
According to our custom, may one eat fried Matzah within thirty days before Pesach?
Yes. However, this is only allowed if one uses enough oil to alter the taste of the Matzah.
According to our custom, what is one to do if the only available bread for the Shabbos meal is Matzah?
One may eat the Matzah regularly. One is not required to perform Hataras Nedarim in such a circumstance. This certainly applies to a woman who is in a hospital after childbirth, and the hospital, which is already Kosher for Pesach, is only serving Matzah. If one has time before Shabbos, then one can fry the Matzahs with oil, thereby fulfilling both one’s Shabbos obligations and his custom.
May a child eat Matzah during the thirty days?
A child who is not old enough to understand the story of the exodus that is told to him [on the Seder night], may be fed Matzah throughout the thirty days, including on Erev Pesach, as well as on Pesach even prior to Kiddush, if needed. However, a child who can understand the story of the exodus that is told to him [on the Seder night] is forbidden to be fed Matzah on Erev Pesach, and thus according to the custom is to avoid eating Matzah during the thirty days. This law applies whether the child is a boy or a girl.
 Igros Kodesh 8:219; See Igros Moshe 1:155
The reason: Although from the letter of the law it is permitted to eat Matzah prior to Erev Pesach [471:4], nevertheless, some are accustomed to abstain from eating Matzah for thirty days beforehand, as the entire reason behind not eating Matzah is in order to avoid experiencing the Mitzvah prior to its proper time, just like one may not have relations with an Arusa until Nessuin takes place. Accordingly, it is proper to avoid eating Matzah starting thirty days beforehand, as is the ruling with all matters relating to Pesach. Nevertheless, the Sages did not desire to establish such a decree due to the difficulty of it being upheld by the public. It was therefore only prohibited on Erev Pesach [Igros Moshe ibid]. Alternatively, we also want the Matzah to contain a novel and thus endearing element to it, and thus be new and beloved onto the person. [Likkutei Mahrich, Seder Hanhagas Chodesh Nissan p. 3b]
 Shvus Yaakov 471:7 based on Shiyurei Kneses Hagedola 471:3; Beir Heiytiv 471:5; M”B 471:12; Igros Moshe 1:155 writes that many are accustomed like this ruling. Lev Chaim 2:88 writes that it is a mere stringency and not required from the letter of the law.
The reason: They follow the same reasoning explained in the previous custom of avoiding Matzah for thirty days. Nevertheless, they only avoid from Rosh Chodesh, as according to Rav Shimon Ben Gamliel, the Chametz laws relevant to Pesach only being to apply two weeks prior and not thirty days. [Igros Moshe ibid]
Other Opinions: Some Poskim ridicule the custom of avoiding eating Matzah before Erev Pesach. [Orchos Chaim Spinka in the name of Meoreiy Or “Od Lamoed” p. 35b, writes that one should not say that many [Rabim] are accustomed to abstain from eating Matzah starting from Rosh Chodesh, but rather one should read Rakim [ignoramuses] are accustomed to avoid eating Matzah before Erev Pesach, as they are arguing on the decree of the Sages which only prohibited on Erev Pesach itself.]
 M”A 471:6 in name of Ran; So rules Igros Moshe 1:155; Rav Poalim 3:27
 Admur 471:4
 Based on 471:7, it is forbidden to eat this Matzah on Erev Pesach as perhaps the Nefucha or Kefula is not Chametz. Seemingly, the same would apply regarding our custom to avoid Matzah within thirty days before Pesach. See Chikreiy Minhagim p. 154
 Mishnas Yaakov 3:471
 As from the letter of the law these Matzahs are Kosher for Pesach. See Chapter 8 Halacha 2!
 As from the letter of the law these Matzahs are Kosher for Pesach. [See Piskeiy Teshuvos 471 footnote 16]
 Mishneh Halachos 6:102; Mishnas Yaakov 3:471
 The reason: As one is only forbidden from eating Matzahs on Erev Pesach if they are possibly Kosher for Pesach, as is evident from the ruling of Admur ibid regarding eating Kefula and Nefucha on Erev Pesach and regarding the allowance to eat Kneidlach. Furthemrore, such Matzos are not made Lishma and are thus invalid on the first night of Pesach. [See Admur 453:15]
 Matzos Mitzvah 12 footnote 29; Mikraeiy Kodesh Pesach 2:25; See Piskeiy Teshuvos 471:4; Chikreiy Minhagim p. 151
 The reason: As although the packaging of these Matzahs state they are Chametz, this is not for certain, as it is possible that some of the Matzahs were indeed baked within 18 minutes. Furthermore, even if the Matzahs are Chametz since they have the taste of Matzah they are to be avoided. [See Maharsha Pesachim 99b]
 Piskeiy Teshuvos 471 footnote 16 writes that this is the accepted ruling he has received from Rabbanim and Morei Horaah. The reasoning is because the taste of these Matzahs is not similar at all to handmade Matzahs.
 The reason: As one cannot fulfill his obligation with cooked Matzah, and the prohibition from eating Matzah on Erev Pesach only applies to Matzah that one can fulfill his obligation with. [Admur 471:8] Hence, cooked Matzah may certainly be eaten within 30 days before Pesach as well.
 In which case they would be permitted to be eaten even on Erev Pesach. [Admur 471:4]
 Admur 462:6
 See Admur 471:9 and 461:13 for a dispute regarding this matter.
 Admur ibid
 The reason: As in such a case, the Matzah would be permitted to be eaten even on Erev Pesach. [Admur 471:8-9] As Matzah that is fried and receives the taste of oil becomes Matzah Ashira. Although it is disputed regarding the laws of blessings regarding whether Matzah that was fried [but not deep fried] is considered cooked or baked. Nevertheless, regarding the laws of Matzah, according to all opinions the Matzah is considered cooked/Ashira, and is thus invalid (for the Pesach obligation).
The blessing for fried Matzah: See the coming footnotes!
 The reason: Because avoiding Matzah throughout the thirty days is only a custom and is not required from the letter of the law, while eating a meal with bread on Shabbos is required from the letter of the law. One is thus required to break his custom for the sake of fulfilling the Mitzvah of the Shabbos meal. [See Admur 613:19 “There is no custom to allow the prohibited, but rather to prohibit the allowed”.]
 The reason: If a circumstance came up which poses a difficulty for one to keep his Chumra, Hiddur, or custom, and if it is unusual to exercise this Hiddur even in such circumstances, then one is not required to perform Hataras Nedarim. [M”A 581:12; Machatzis Hashekel ibid; Degul Merivava ibid and Yoreh Deah 214:1; Rama 568:2; 581:2 [regarding a Bris during Ba”hab or Aseres Yimei Teshuvah]
Opinion of Michaber and Shach: The Michaber 214:1, rules regarding the Hiddur of fasting during Aseres Yimei Teshuvah, that even if one became weak, he is required to do Hataras Nedarim. The Shach 214:2, explains that the reason for this is because only those circumstances that are publicly known not to be included within the Hiddur, such as eating during a Bris Mila during Aseres Yimei Teshuvah, do not require Hataras Nedarim. However, unexpected circumstances are included in the Hiddur and thus require Hataras Nedarim. The Degul Merivava ibid, argues against the Shach’s explanation and says that the Michaber’s (ibid) ruling referred to a case where due to weakness the person wanted to permanently revoke his custom, and for this everyone agrees that Hatara is required.
 Heard from Rav Asher Lemel HaCohen, as she may even eat on Yom Kippur.
 How much oil is one to use, and does the frying affect the blessing of the Matzah?
If the Matzah is a Kezayis in size when fried: Then regardless of the amount of oil used, even if the Matzah is deep fried it remains Hamotzi. [Seder 2:12]
If the Matzahs are less than a Kezayis in size prior to frying: If the Matzah was less than a Kezayis in size from the start of the frying, then a very minute amount of oil is to be used for the frying, but enough so that the taste of the Matzah changes, for when a very minute amount of oil is used, simply to keep the dough from sticking to the pan, the Matzah remains Hamotzi according to all. [Seder 2:11]. If, however, one uses a larger amount of oil, then there is a dispute as to its blessing, and the main ruling holds that it is Mezonos and Al Hamichyah. [See Seder 2:12-13, that there are two disputes in this matter, one regarding if frying is considered cooking or baking [Seder 2:12], and another as to whether cooking less-than-Kezayis breads makes them Mezonos [Seder 2:13]. Thus, in order to avoid turning the Matzah into Mezonos, one should use a minute amount of oil if the Matzah pieces are less than a Kezayis. However, one must still use enough oil to change the taste of the Matzah so that the Matzah is now considered Matzah Ashira, and one can no longer fulfill his Pesach obligation with it.
If the Matzah started off as a Kezayis, but became less than a Kezayis through the frying: The Matzah is Mezonos unless a very small amount of oil was used (simply so the dough does not stick,) in which case it remains Hamotzi. [See Seder 2:12-13]
 Admur 471:10; Rama 471:2; Terumos Hadeshen 125
 The reason: As Kosher foods which are time forbidden may be fed to a child if he is in need of them. [Admur ibid; See Admur 343:6]