Rabbi Dovid Cohen
Chicago Rabbinical Council - cRc Kosher
Rabbi Dovid Cohen is the Administrative Rabbinical Coordinator at cRc Kosher, where his work includes ingredient review and approval, the flavor industry, and finance. He previously coordinated halachic policy for OU Kosher for seven years and teaches practical contemporary kashrus through the Kashrus Halacha podcast and sefarim.
Shiurim
- Freeze Drying (Q&A 79)
Rabbi Dovid Cohen
Freeze Drying See seforim by Rabbi Cohen at www.kashrushalacha.com
- Where Did The Infestation Occur (Halachos of Insects #14 - Shulchan Aruch 84:7)
Rabbi Dovid Cohen
Where did the infestation occur Why not follow chazaka Calimyrna figs Buy the book at www.kashrushalacha.com
- Three Ha'amados (Kosher Dairy #22 - Shulchan Aruch 115:3)
Rabbi Dovid Cohen
Three ha'amados Source Ratios Kefir grains Which issurim
- Numbers DO Lie (Kosher Anthology 5)
Rabbi Dovid Cohen
Numbers DO Lie: Displaced abomasum; Italian pasta; Laundry-grade glycerin; Copepods in New York water; Milk from many cows; Volume vs. weight; Shiur challah; Heat vs. temperature; Wine in Canadian whisky; Concentrated wine; See seforim by R
- Aino Ben Yomo (Bitul and Blios #45 - Shulchan Aruch YD 103:5)
Rabbi Dovid Cohen
Aino Ben Yomo : General Halacha; Calculations; Not effective b'dieved; Rely on it l'chatchilah (hag'alah, 12 months). See seforim by Rabbi Cohen at www.kashrushalacha.com
- Methanol Recovered from a Biodiesel Reaction (Animal Products #11 - Shulchan Aruch 81:6)
Rabbi Dovid Cohen
Methanol Recovered from a Biodiesel Reaction Our halacha Biodiesel production Methanol recovered
- Vinegar [Part 1] (Kosher Anthology 42)
Rabbi Dovid Cohen
Vinegar (Part 1): How vinegar is made; Double fermentation; Equipment; Kashrus Concerns. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Stam Keilim Ainum Bnei Yoman (Bitul and Blios #46 - Shulchan Aruch YD 103:5)
Rabbi Dovid Cohen
Stam keilim ainum b'nei yoman (סתם כלים אינם בני יומן): Basic halacha; Kashering; Pesach; Factories. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Milk and Meat in the Home [Part 1] (Kosher Classes #23)
Rabbi Dovid Cohen
Milk and Meat in the Home - Part 1 Foods - Dairy bread, imitation items Food preparation - separations (oil and spices, double oven), oven/microwave/stovetop, kashering back and forth
- Insects in Fruit (Kosher Classes #21)
Rabbi Dovid Cohen
Insects in Fruit
- Tunnel Pasteurizer and Cooling Tunnel (Hashgachah Practicum #45 - Equipment G)
Rabbi Dovid Cohen
Tunnel Pasteurizer and Cooling Tunnel: Introduction; The equipment; Transfer of Ta'am and Kashering; Kli rishon vs. kli sheini; Additional factors. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Efshar L'hasiro (Bitul and Blios #30 - Shulchan Aruch YD 98:4)
Rabbi Dovid Cohen
Efshar L'hasiro (אפשר להסירו): D'oraisah or d'rabannan? Fat and fat; Orange juice; Rice for Sephardim for Pesach; Hopelessly lost. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Kol Kavuah, Kol D'Parish (Bitul and Blios #61 - Shulchan Aruch YD 110:3)
Rabbi Dovid Cohen
Kol Kavuah, Kol D'Parish: כל קבוע, כל דפריש: Kavuah d'oraisah; Kavuah d'rabbanan; Kol d'parish; What is considered parish; Pesach. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Miut Hamatzui (Kosher Classes #69)
Rabbi Dovid Cohen
Miut Hamatzui: Insects; Muchzak vs. matzui; D'oraisah vs d'rabannan; Definition. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Teraifos in Milk and Poultry (Kosher Classes #43)
Rabbi Dovid Cohen
Teraifos in Milk and Poultry Milk/Dairy (introduction, DA cows, Holstein cows for milking) Poultry/Eggs (general, injections, buka d’atmah, tzomes hagidin, broken wings & bones, Meckel’s Diverticulum, other, checking in the USA)
- Steam Systems (Kosher Classes #2)
Rabbi Dovid Cohen
Steam
- Aruch HaShulchan's Limud Zechus (Halachos of Insects #23 - Shulchan Aruch 84:9)
Rabbi Dovid Cohen
Aruch HaShulchan's limud zechus Gourmet bags Buy the book at www.kashrushalacha.com
- Medical Drinks (Q&A #2) (Feb 8, 2023)
Rabbi Dovid Cohen
Medical Drinks. See seforim by Rabbi Cohen at www.kashrushalacha.com
- How Food Can Be Chametz (version 2) (Pesach #22b)
Rabbi Dovid Cohen
How Food Can Be Chametz Five grains Barley malt Beer & whisky Glucose Ethyl alcohol Vinegar Fermentations
- Carbon Dioxide From Chametz (Kashering #25 - Shulchan Aruch 451:15)
Rabbi Dovid Cohen
Cover on baking tin Carbon dioxide from chametz
- Cutting and Shooting After Shechitah (Meat and Poultry 12 - Shechitah C)
Rabbi Dovid Cohen
Cutting and Shooting after shechitah - Cutting the neck - Captive bolt to the head - Cutting the spinal cord Video available at https://kshr.us/CutAfter
- Ceramic Knives (Q&A 23)
Rabbi Dovid Cohen
Ceramic Knives See seforim by Rabbi Cohen at www.kashrushalacha.com
- Unusual Teraifos (Meat and Poultry #18 - Teraifos E)
Rabbi Dovid Cohen
Unusual Teraifos Lungs Digestive Tract Meningeal Worm Polish Chicken Video available at http://kshr.us/UnusualTeraifos
- Drinking in a non-Jew's bar or home [Alcoholic Beverages #2 - Shulchan Aruch 114:1]
Rabbi Dovid Cohen
Drinking in a non-Jew's bar or home Source of the prohibition; Which locations; Which beverages. Buy the book at www.kashrushalacha.com
- Chalav Stam (Kosher Dairy #5 - Shulchan Aruch 115:1)
Rabbi Dovid Cohen
Chalav stam Do we accept Pri Chadash? Iggeros Moshe Disagreement with Iggeros Moshe Explanation of Iggeros Moshe
- Different Community Standards (Q&A #12)
Rabbi Dovid Cohen
Different Community Standards. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Jewish Owned Beer Company [Alcoholic Beverages #6 - Shulchan Aruch 114:2]
Rabbi Dovid Cohen
Jewish Owned Beer Company Source Rif Rambam Rosh Maharshal Halacha Buy the book at www.kashrushalacha.com
- Restaurant Mashgiach (Q&A 40)
Rabbi Dovid Cohen
Restaurant Mashgiach See seforim by Rabbi Cohen at www.kashrushalacha.com
- Safek Arlah (Halachos of Insects #20 - Shulchan Aruch 84:9)
Rabbi Dovid Cohen
Safek arlah Introduction Principles Kol d'parish and miut hamatzui Safek kavuah Other reasons to be machmir Buy the book at www.kashrushalacha.com
- Vitamins and Medicine (Kosher Classes #17)
Rabbi Dovid Cohen
Vitamins & Medicine Do They Need To Be Kosher? Given at the Midwest Agudah Convention
- Lab Grown Meat (Q&A 37)
Rabbi Dovid Cohen
Lab Grown Meat See seforim by Rabbi Cohen at www.kashrushalacha.com
- Issur Hana'ah (Alcoholic Beverages #25 - 123:1)
Rabbi Dovid Cohen
Issur hana’ah - Ger Toshav - Muslims, - Catholics - Practical applications Buy the book at www.kashrushalacha.com
- Mistakes on Pesach (Pesach #33)
Rabbi Dovid Cohen
Mistakes on Pesach
- Chazusah (Bitul and Blios #40 - Shulchan Aruch YD 102-1)
Rabbi Dovid Cohen
Chazusah (חזותא): Sources; Opinions; Other details. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Shelf or Basket in the Keilim Mikvah (Tevillas Keilim #27 - Shulchan Aruch 202:3-6)
Rabbi Dovid Cohen
Plastic handle on metal pot Shelf or basket in the keilim mikvah Contradictory Mishnayos Ravyah, Chacham Tzvi, Rash Summary Later Poskim Buy the book at www.kashrushalacha.com
- Maintaining Integrity (Meat and Poultry 7 - Shochet C)
Rabbi Dovid Cohen
- Takanas shnei shochetim - Shechitah gelt Video available at https://kshr.us/Integrity
- Bishul Yisroel - Methods (Hashgachah Practicum #39 - Bishul Yisroel D)
Rabbi Dovid Cohen
Methods of Creating Bishul Yisroel: Light the flame; Aish M'aish (basics, halachic and practical considerations); Hashlachas kisem; Residual Heat; Convection oven. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Trusting an Individual Man, Woman, or Child [Part 1] (Halachos of Insects #25 - Shulchan Aruch 84:11)
Rabbi Dovid Cohen
Trusting an individual man, woman or child (Part 1): Cases & factors Zavvah Taharos & shechitah Bedikas chametz (Tosfos) Bedikas chametz (Ran) Techum Buy the book at www.kashrushalacha.com
- Glass (Kashering #35 - Shulchan Aruch 451:26)
Rabbi Dovid Cohen
Glass [Part 1]
- Whisky [Part 1] (Kosher Classes #7)
Rabbi Dovid Cohen
Whiskey - Part 1
- Chametz (Hashgachah Practicum #31 - Pesach A)
Rabbi Dovid Cohen
Chametz: Flour; Oats; Mixed-in; Non-chametz; Barley; Beer and whisky; Alcohol and vinegar; Starch and glucose. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Injections in Poultry (Meat and Poultry 2 - Livestock B)
Rabbi Dovid Cohen
Injections in Poultry: Original issue - neck, skilled operator In Ovo Inoculation - method, hitting the embryo, teraifah before birth, where the needle hits, proposal Video at https://kshr.us/Injections
- Size of Forbidden Insects [Part 2-Direct Proofs] (Halachos of Insects #12 - Shulchan Aruch 84:6)
Rabbi Dovid Cohen
Size of forbidden insects (part 2)-Direct proofs Five grades of insect sizes Poskim's descriptions of insect sizes Nekudah shechorah Citrus scale
- Tea (Q&A 71)
Rabbi Dovid Cohen
Tea See seforim by Rabbi Cohen at www.kashrushalacha.com
- Food is Oleh if Prepared Differently (Bishul Yisroel #18 - Shulchan Aruch 113:1)
Rabbi Dovid Cohen
The food is oleh if prepared differently Parperes Three applications Proofs Buy the book at www.kashrushalacha.com
- Unusual Eggs [Eggs #3 - 86 1-2c]
Rabbi Dovid Cohen
Unusual Eggs - Identifying eggs - Atypical eggs - Araucana chickens - Duck eggs - Quail
- Varnished Wood (Kashering #34 - Shulchan Aruch 451:24-25)
Rabbi Dovid Cohen
Varnished wood Cups used occasionally for hot
- Homeopathic Remedies (Q&A 92)
Rabbi Dovid Cohen
Homeopathic Remedies See seforim by Rabbi Cohen at www.kashrushalacha.com
- Summary of First 6 Topics (Shemittah #22 - Summary)
Rabbi Dovid Cohen
Summary of First 6 Shemittah Topics: - General Points (hashkafah, by the numbers) - Consumers (years, borders, yevul nochri, greenhouses, heter mechirah, otzar Beis Din, kedushas shevi'is) - Farmers (heter mechirah, keep shemittah, otzar Be
- Bitul of Safek Issur [Part 2] (Alcoholic Beverages #23 - 114:12)
Rabbi Dovid Cohen
Bitul of Safek Issur (part 2) - Shach - Safek Issur - Other opinions (Toras Hashelamim, Pri Megadim, Rebbi Akiva Eiger) Buy the book at www.kashrushalacha.com
- Pesach Which Begins on Shabbos (Pesach #36)
Rabbi Dovid Cohen
Pesach Which Begins on Shabbos Time of Korban Pesach Forgot zeroah & Beitzah Size of kos of kiddush Sit for vayechulu Forgot havdalah Forgot saltwater Min hazevachim u’min hapesachim Forgot charoses Add wine to charoses Cooking for 8th day
- Calculating Aino Ben Yomo, Pegimah (Kashering #40 - Shulchan Aruch 452:2)
Rabbi Dovid Cohen
Calculating aino ben yomo Pegimah
- Hidden Issues (Meat and Poultry #36 - Miscellaneous A)
Rabbi Dovid Cohen
Hidden issues in a kosher slaughterhouse: Dewlap tag Electric prod Electrical stimulation Rodding the weasand Watch the video at http://kshr.us/Hidden
- Using Shemittah Produce (Shemittah #16 - Shemittah Produce E)
Rabbi Dovid Cohen
Using Shemittah Produce Lemon Apple Oil Wine Animal food Picking fruit Cooking & pureeing Miscellaneous Buy the book at www.kashrushalacha.com
- Shelichus for Hafrashah (Hafrashas Challah #20 - Shulchan Aruch 328:3)
Rabbi Dovid Cohen
Shelichus for Hafrashah The need for shelichus Zachin mei’adam Trust the sheliach
- Jordan (Kosher Anthology 25)
Rabbi Dovid Cohen
Jordan: Ever Hayarden (עבר הירדן); Terumah, Ma'aser, Arlah; South; East; Yom Tov Sheini (Rambam and Ritva, Ever HaYarden, Eilat). See seforim by Rabbi Cohen at www.kashrushalacha.com
- Less Than a Kezayis of Chametz (Kashering #27 - Shulchan Aruch 451:17)
Rabbi Dovid Cohen
Less than a kezayis of chametz Examples of this at factories
- Bourbon From a Jewish Owned Company (Bitul and Blios #28 - Shulchan Aruch YD 98:2)
Rabbi Dovid Cohen
מין במינו - בתא שמא או בתר טעמא; Bourbon from a Jewish owned company: Chametz after Pesach (חמץ שעבר עליו הפסח); Name/title or taste (בתר שמא או בתר טעמא); Bourbon; Distilled Alcohol (Minchas Boruch). See seforim by Rabbi Cohen at www.kashr
- Shochet Qualifications (Meat and Poultry 5 - Shochet A)
Rabbi Dovid Cohen
- Jewish (Bene Israel) - Man - Knowledge - Skill - Yiras Shomayim Video available at https://kshr.us/Qualifications
- Bugs are Lifgam (Bitul and Blios #48 - Shulchan Aruch YD 104:3)
Rabbi Dovid Cohen
Bugs are Nosein Ta'am Lifgam : People are disgusted by them; Cricket powder; Beryah. See seforim by Rabbi Cohen at www.kashrushalacha.com