Halacha: What Blessings Are Recited for Jachnun?

ForJachnun, recite Mezonot (the first blessing)

At the end of the meal, recite Al Hamichya (the last blessing)

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The required amount of food to obligate the last blessing (from "Daily Halacha" based on the rulings of Maran Rabbi Ovadia Yosef, of blessed memory):

For everything a person eats, they must recite a "first blessing," such as "Shehakol" or "Ha'etz." Even if they eat only a small amount, they must bless it if intended as food. (However, if tasting only to adjust seasoning, for instance, no blessing is required.) Therefore, chewing flavored gum requires a blessing on its taste, even if little is swallowed. Likewise, for drinking, a blessing is needed even for just a single drop of the beverage.

This applies only to the first blessing. A "last blessing" is only recited after eating a "significant quantity"—a quantity of "k'zayit," approximately twenty-seven grams. For drinking, the measure is "a fourth," eighty-one grams.

Additionally, eating or drinking must occur within a set timeframe for the blessings to be applicable. For example, if one eats a k'zayit of bread over an entire day, they surely cannot recite the blessing afterwards. The k'zayit must be consumed within the time equivalent to "K'dei Achilat Pras," with varying opinions on this duration—some say five minutes, others seven and a half (with additional perspectives). Thus, it's advisable to consume a k'zayit (especially during Shabbat meals) within four and a half minutes to satisfy all opinions.

Concerning the last blessing on beverages, a fourth must be consumed in one go. If stops occur between sips, the last blessing is not recited. Therefore, consuming soup with a spoon does not require a last blessing, as a fourth isn't consumed at once. Similarly, hot coffee or tea doesn't require a last blessing, as it's impractical to drink it in one go.