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
- Copepods in New York City Water (Halachos of Insects #2 - Shulchan Aruch 84:2)
Rabbi Dovid Cohen
Copepods in New York City Water Background Moschim and nov'im Three opinions Buy the book at www.kashrushalacha.com
- Greenhouse Produce (Hashgachah Practicum #37 - Insects C)
Rabbi Dovid Cohen
Greenhouse Produce: Methods; Insects; Bracha; Marror. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Kashrus of Medicines (Kosher Classes #38)
Rabbi Dovid Cohen
Kashrus of Medicine Liquids and chewables Edibility Ach’shvei Severity of illness Flavors Gelcaps/Softgel Ingredients Substitutions Decision tree General rules
- Keeping Kosher (Kosher Classes #27)
Rabbi Dovid Cohen
Keeping Kosher
- Methods of Food Preparation [Part 2] (Bishul Yisroel #33 - Shulchan Aruch 113:13)
Rabbi Dovid Cohen
Methods of Food Preparation [Part 2] Smoking Steam Buy the book at www.kashrushalacha.com
- Is It Chametz? (Pesach #43)
Rabbi Dovid Cohen
Is It Chametz? Foods Non-Foods Medicines Pets See Rabbi Cohen's seforim at www.kashrushalacha.com
- Medical Advocates (Kosher Classes 72)
Rabbi Dovid Cohen
Medical Advocates: Your turf; Kashrus knowledge; Placing patients. See seforim by Rabbi Cohen at www.kashrushalacha.com
- "D" and "DE" (Q&A 24)
Rabbi Dovid Cohen
"D" and "DE" Dairy and Dairy Equipment See seforim by Rabbi Cohen at www.kashrushalacha.com
- Tevillah at a Houseware Store (Tevillas Keilim #10 - Shulchan Aruch 120:8)
Rabbi Dovid Cohen
Klei sechorah Jew purchased for non-food use Tevillah before it was required Tevillah at a Houseware store Storekeepers Tevillah after the sale Tevillah for a present Buy the book at www.kashrushalacha.com
- Cheese vs. Butter (Kosher Dairy #21 - Shulchan Aruch 115:3)
Rabbi Dovid Cohen
Milk powder and casein (revision) Cheese vs. butter Cheese from chalav akum Cheese vs. butter
- Shechitah Pen (Meat and Poultry 11 - Shechitah B)
Rabbi Dovid Cohen
Shechitah Pen - History - Shackle and Hoist - Upright ASPCA Pen - Rotating Weinberg Casting Pen Video available at https://kshr.us/ShechitahPen
- Math (Q&A 82)
Rabbi Dovid Cohen
Math See seforim by Rabbi Cohen at www.kashrushalacha.com
- Beverages (Hashgachah Practicum #35 - Consumer E)
Rabbi Dovid Cohen
Beverages: Water; Fruit juice; Grape juice and wine; Soda; Energy drinks; Alcoholic beverages. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Which Foods Might Be Chametz [Part 2 - Halacha] (Pesach #11)
Rabbi Dovid Cohen
Which Foods Might Be Chametz Part 2-Halacha - Tempering of Flour - chametz, matzah - Oats - Bran & Chaff - Koji fermentation, furfural
- Residual Heat (Pas Yisroel #11 - Shulchan Aruch 112:10)
Rabbi Dovid Cohen
Residual heat Like hashlachas kisem Mechaber/Rema How long can it last? Convection (and regular) ovens Buy the book at www.kashrushalacha.com
- Chozer V'Niur (Kashering #36 - Shulchan Aruch 451:27)
Rabbi Dovid Cohen
Glass [Part 2] Chozer v'niur
- Carmine (Halachos of Insects #35 - Shulchan Aruch 84:17)
Rabbi Dovid Cohen
Carmine Binas Adam Minchas Yaakov Shellac Buy the book at www.kashrushalacha.com
- Materials [Part 2] (Tevillas Keilim #2 - Shulchan Aruch 120:1)
Rabbi Dovid Cohen
Materials (Part 2) - Plastic - Cardboard - Paper - Aluminum and other “new” metals - Other materials Buy the book at www.kashrushalacha.com .
- Pesach Shorts [Part 1] (Kosher Anthology 49)
Rabbi Dovid Cohen
Pesach Shorts [Part 1]: Coffee decaffeination; 5-gallon water jugs; Mashgiach visiting bakery on Pesach. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Danger (Q&A 77)
Rabbi Dovid Cohen
Danger See seforim by Rabbi Cohen at www.kashrushalacha.com
- Petrochemicals (Hashgachah Practicum #51 - Ingredients H)
Rabbi Dovid Cohen
Petrochemicals: Introduction (hydrocarbons, nomenclature); Primary chemicals (alkanes, alkenes/olefins, aromatics); Finished products; Renewables. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Davening (Meat and Poultry 6 - Shochet B)
Rabbi Dovid Cohen
- Yiras Shomayim - Is shechitah a mitzvah - Paid to shecht - Sephardim - Break time - Did not daven Video available at https://kshr.us/Davening
- Foie Gras (Meat and Poultry #31 - Specific Parts A)
Rabbi Dovid Cohen
Can Foie Gras be certified as kosher? Four issues to consider: Species Tzaar Baalei Chaim Nekuvas Haveshet Kashering See the video at http://kshr.us/FoieGras https://youtu.be/hzzi6yrIFgA April 9 http://kshr.us/FoieGras
- China and Teflon (Tevillas Keilim #9 - Shulchan Aruch 120:6-7b)
Rabbi Dovid Cohen
China and Teflon Buy the book at www.kashrushalacha.com
- Wine Vinegar (Alcoholic Beverages #33 - 123:6-8)
Rabbi Dovid Cohen
Wine Vinegar - Stam yayin - Berachos Buy the book at www.kashrushalacha.com
- Sirchos of the Lungs (Meat and Poultry 14 - Teraifos A)
Rabbi Dovid Cohen
Sirchos of the lungs - Structure of the lungs - Terminology - Sirchos - Why we check the lungs - Other teraifos Video available at https://kshr.us/Sirchah
- Bee Products (Q&A 66)
Rabbi Dovid Cohen
Bee Products See seforim by Rabbi Cohen at www.kashrushalacha.com
- Dough of a Non-Jew (Hafrashas Challah #26 - Shulchan Aruch 330:1-3)
Rabbi Dovid Cohen
Dough of a non-Jew: Commercial settings Review of the tevel hafrashas challah system
- Creating Bishul Yisroel (Kosher Classes #14)
Rabbi Dovid Cohen
Creating Bishul Yisroel
- Fruit Trees (Q&A 91)
Rabbi Dovid Cohen
Fruit Trees See seforim by Rabbi Cohen at www.kashrushalacha.com
- Performing the Hafrashah (Hafrashas Challah #19 - Shulchan Aruch 328:1)
Rabbi Dovid Cohen
Performing the hafrashah Verbalizing the hafrashah Wording of the bracha Standing for the bracha Designating the challah
- Arlah in Vineyards (Kosher Classes #68)
Rabbi Dovid Cohen
Arlah in Vineyards: Grape growth; Arlah basics; Primary questions; Safek arlah in chutz la'aretz; Atzis she'aino nakuv; Neta revai. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Poultry (Q&A 88)
Rabbi Dovid Cohen
Poultry See seforim by Rabbi Cohen at www.kashrushalacha.com
- Length of Hag'alah (Kashering #17 - Shulchan Aruch 451:9)
Rabbi Dovid Cohen
Length of hag'alah
- Bishul Akum (Kosher Classes #4)
Rabbi Dovid Cohen
Bishul Akum
- Sinning to Save from Sinning (Hafrashas Challah #16 - Shulchan Aruch 325:2)
Rabbi Dovid Cohen
Sinning to save else from sinning (חטא בשביל שיזכה חבירו ) Hafrashah from non-mukaf Seemingly contradictory Gemaros Rishonim’s resolutions Save from shmad Other examples
- Tempering of Wheat - Bonus Material (Kosher Anthology 38)
Rabbi Dovid Cohen
Tempering of Wheat - Bonus Material: Tofeach or Al Minas Lehatfiach? Leratzon; Safek Tumah. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Meat and Fish (Bitul and Blios #13 - Shulchan Aruch 95:1)
Rabbi Dovid Cohen
Meat and Fish Danger Separation Bitul (bitul b'shishim, bitul issur l'chatchilah) Worcestershire sauce Fish oil Marshmallows Fish fork B'lios See seforim by Rabbi Cohen at www.kashrushalacha.com
- Pas Paltar (Pas Yisroel #2 - Shulchan Aruch 112:2)
Rabbi Dovid Cohen
Pas Paltar Heitiru Pas Times to be machmir Buy the book at www.kashrushalacha.com
- Milk From Cows That Ate Chametz (Pesach #17)
Rabbi Dovid Cohen
Milk from cows that ate chametz Kol yamehah Zeh v'zeh gorem What do they eat Peh she'asid Practical application
- Whey [Part 2] (Kosher Dairy #13 - Shulchan Aruch 115:2)
Rabbi Dovid Cohen
Whey (part 2) Cook-water Animal rennet Kashering after non-kosher whey
- Drinks (Q&A 29)
Rabbi Dovid Cohen
Drinks See seforim by Rabbi Cohen at www.kashrushalacha.com
- Dehydrated & Freeze Dried Herbs (Halachos of Insects #30 - Shulchan Aruch 84:12)
Rabbi Dovid Cohen
Dehydrated herbs Freeze Dried Herbs Buy the book at www.kashrushalacha.com
- Coffee on Shabbos (Kosher Classes #22)
Rabbi Dovid Cohen
Coffee on Shabbos
- Coffee On The Road (Kosher Classes #55)
Rabbi Dovid Cohen
Coffee on the road: Starbucks; Rest stops; Convenience stores; Hotel room; Office. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Tevillah on Assorted Utensils (Tevillas Keilim #7 - Shulchan Aruch 120:5b)
Rabbi Dovid Cohen
Storage containers Toaster Blech Sandwich-Maker Immersion Blender Meat Thermometer Flour Sifter Food Scale Immersion Heater Buy the book at www.kashrushalacha.com
- Jew Started The Cooking (Bishul Yisroel #24 - Shulchan Aruch 113:6)
Rabbi Dovid Cohen
Jew Started the Cooking Gemara Rema Buy the book at www.kashrushalacha.com
- Cream of Tartar (Alcoholic Beverages #37 - 123:14-16)
Rabbi Dovid Cohen
Cream of Tartar - Background, - Tartaric acid - Arlah Buy the book at www.kashrushalacha.com
- Beheimah Shehorah Bo Chacham (Kosher Anthology 24)
Rabbi Dovid Cohen
Beheimah Shehorah Bo Chacham / בהמה שהורה בו חכם: Sevara vs. Mesorah; Bitul; Who; Applications. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Science and Kashrus (Kosher Classes 74)
Rabbi Dovid Cohen
Science and Kashrus: Animal fat and vegetable oil (glycerin, fatty acids); Vape juice, e-cigarettes, and flavors; Glucose; Medicine; Vacuum and pressure. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Sefichin for Farmers (Shemittah #11 - Avodas Karka E)
Rabbi Dovid Cohen
Sefichin for farmers - Planted in the sixth year - Grains & kitnios Buy the book at www.kashrushalacha.com
- Requirement to Check Produce (Hashgachah Practicum #32 - Insects A)
Rabbi Dovid Cohen
Requirement to check produce: Miut hamatzui; Defining matzui (surprise, portions); Muchzak b'tolaim; Can't check, already cooked; Smoothies and broccoli kugel. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Water Touching the Entire Utensil (Tevillas Keilim #29 - Shulchan Aruch 202:9)
Rabbi Dovid Cohen
Water touching entire utensil Fully submerged Electric pot and blender Springform pan Pocket knife Buy the book at www.kashrushalacha.com
- Size of Forbidden Insects [Part 1-Questions] (Halachos of Insects #11 - Shulchan Aruch 84:6)
Rabbi Dovid Cohen
Size of forbidden insects (part 1) Questions Whose vision? Visible or iIdentifiable? Mutar or ones? Buy the book at www.kashrushalacha.com
- Bloodspots (Eggs #8 - 86:7-8)
Rabbi Dovid Cohen
Bitul l’chatchilah on a davar pagum Bloodspots - How they form - Halachic status - Non-fertilized eggs - Checking eggs - Protein spots
- Pesach Update 2026 (Pesach #47)
Rabbi Dovid Cohen
Pesach Update: Seltzer; Toothpaste, mouthwash, lipstick; Mouse traps; Water coolers and dispensers (Noam); Vinegar-based cleansers; Corelle. See Rabbi Cohen's seforim at www.kashrushalacha.com
- Bitul of Keilim (Bitul and Blios #41 - Shulchan Aruch YD 102:2-3)
Rabbi Dovid Cohen
Bitul of Keilim: Non-Automatic Heter; Kashering; Expense, other factors; Aino ben yomo; Pesach; Tevillas Keilim. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Kashering of Cheese Equipment (Hashgachah Practicum #50 - Dairy E)
Rabbi Dovid Cohen
Kashering of Cheese Equipment: Cheese tanks; Brining; Cheese wires; Shrink tunnel. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Dairy Bread (Bitul and Blios #24 - Shulchan Aruch YD 97:1)
Rabbi Dovid Cohen
Dairy Bread: Basic halacha; Kashering; Bitul; Which foods; K'ein turah; Timing. See seforim by Rabbi Cohen at www.kashrushalacha.com
- Bishul Yisroel Summary (Kosher Classes #46)
Rabbi Dovid Cohen
Review/summary of the halachos of bishul Yisroel