Halacha: What Blessing Do We Say on Chocolate?

Regarding chocolate, we say Shehakol (the first blessing)

At the conclusion of eating, we say Borei Nefashot (the after-blessing)

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The eating quantity to be liable for an after-blessing (from "Halacha Yomit" by the rulings of Maran Rabbi Ovadia Yosef ztz"l):

For everything a person eats, they must recite a "first blessing," such as the blessing "Shehakol" or "Ha'etz." Even if one only eats a small amount of the food, they are required to bless it, as long as it is being eaten with the intention to eat. (However, if tasting the food only to improve it by adding spices or similar, no blessing is required at all for such tasting). Therefore, someone chewing flavored chewing gum, although swallowing very little of it, must still bless for enjoying the flavor of the gum. Likewise, anyone about to drink something must bless even if only drinking a single drop of that beverage.

However, all this concerns the first blessing. The after-blessing is recited only when the food eaten constitutes an "important eating," defined as the size of an "olive," which means twenty-seven grams, and for drinking, the size is a "Revi'it," which is eighty-one grams.

Additionally, the eating or drinking must occur within a timeframe that allows the eating or drinking to combine into one. For if a person eats the size of an "olive" of bread throughout the day, crumb by crumb, they certainly cannot bless afterward with the Birkat Hamazon. Rather, the consumption of the "olive size" must all occur within the period defined as "K'dei Achilat Pras," with different opinions among the authorities on this measure, some saying five minutes while others suggest seven and a half minutes (with other views as well). Therefore, it is prudent always to consume an "olive size" (particularly during Shabbat meals) within four and a half minutes to fulfill all opinions.

Regarding the after-blessing for drinks, one must drink a Revi'it of the beverage (which is eighty-one grams) in one go since pausing between sips disqualifies the after-blessing entirely. Thus, someone sipping soup with a spoon does not recite an after-blessing for drinking that soup, as they did not consume a Revi'it all at once. Similarly, one drinking coffee or tea while hot does not bless afterward, because they cannot drink it all at once.