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Kashrus Halacha

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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
Minhag Against Halacha: Maharik; Pri Chadash.See seforim by Rabbi Cohen at www.kashrushalacha.com
Medical Advocates: Your turf; Kashrus knowledge; Placing patients. See seforim by Rabbi Cohen at www.kashrushalacha.com
High School Q&A 2025:
Vaping;
Dairy and DE;
Drinks;
Hechsherim.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Bishul Yisroel Q&A:
Remote lighting;
Sephardim;
Pilot light;
Oleh al shulchan melachim;
Non-Shomer Shabbos;
Potato chips;
Tuna fish;
Eggs;
Beans;
Sushi;
Corn.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Miut Hamatzui:
Insects;
Muchzak vs. matzui;
D'oraisah vs d'rabannan;
Definition.
See seforim by Rabbi Cohen at www.kashrushalacha.com
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
Yoshon Nowadays:
History;
Practical applications.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Foods that might need bishul Yisroel:
Not cooked;
Oleh al shulchan melachim;
Edible raw.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Kashrus Rulings of Rav Feivel Cohen (first yahrtzeit):
Copepods in New York City Water (visible but not recognizable, spawned in the water system);
Mechiras chametz;
Chametz medicine for a choleh;
Vinegar of unknown Pesach status;
Spray dryer kashering;
Kashering plastic;
Keurig machine tevillah;
Stam yayin for a mumar
See seforim by Rabbi Cohen at www.kashrushalacha.com
Introduction to Basar B'chalav:
Separating (waiting, hard cheese, dairy bread);
Common scenarios;
Concepts (ta'am k'ikar, kli rishon, zei'ah, ain habaluah yotzeh, nat bar nat, charif);
B'dieved concepts (bitul b'shishim, aino ben yomo);
Benefit and Cooking.
See seforim by Rabbi Cohen at www.kashrushalacha.com
High School Kosher Q&A (4) - Shabbos, Brachos:
Shabbos:
Taking cholent on Friday night;
Instant coffee, tea, and hot cocoa;
Opening refrigerator and oven;
Brachos:
Wraps;
Cholent;
Granola bars.
See seforim by Rabbi Cohen at www.kashrushalacha.com
High School Kosher Q&A - Part 3 - Chumros:
Yoshon - why, trusting people;
Chalav Yisroel - why, powdered milk;
Pas yisroel;
Bird breeds.
See seforim by Rabbi Cohen at www.kashrushalacha.com
High School Q&A [Part 2];
Hot dogs in stadium;
Vaping;
Toothpaste and mouthwash;
Beverages;
Shellac
See seforim by Rabbi Cohen at www.kashrushalacha.com
High School Q&A [Part 1]:
Meat and milk;
Saltshaker;
D and DE;
Hard cheese;
Pareve in a meat pot;
Dairy spoon in meat drawer;
Shechitos;
Beverages
See seforim by Rabbi Cohen at www.kashrushalacha.com
Olives:
Color;
Storage;
Saltwater brine curing (green olives, Kalamata olives);
Caustic soda (lye) processing (black oxidized ripe olives).
See seforim by Rabbi Cohen at www.kashrushalacha.com
Kashrus Rulings from Rav Belsky;
Irreligious Jews and pas Yisroel;
Miut hamatzui;
Tevillas keilim for certified restaurants;
Shemittah positions;
Raisin juice;
Maintaining tevel status;
Checking for tzomas hagidin;
Hindquarter nikkur;
Farberware pots;
Milk from hundreds of cows;
Emulsifier as a ma’amid.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Milk and Cheese:
Dairy industry overview;
Fat (cream, butter, ice cream);
Protein (acid vs. rennet, casein and cheese, whey, cottage cheese, yogurt, sour cream);
Sugar - Lactose (mei chalav);
Water and minor components;
Creating chalav Yisroel;
Yotzeh v'nichnas;
Video cameras;
Creating gevinas Yisroel.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Sukkah Building:
Location;
Walls;
S'chach.
See seforim by Rabbi Cohen at www.kashrushalacha.com
Coffee on the road:
Starbucks;
Rest stops;
Convenience stores;
Hotel room;
Office.
See seforim by Rabbi Cohen at www.kashrushalacha.com