Pudding Day

What Is Pudding Day?

The 25th of every month is "Pudding Day" (プリンの日, Purin no Hi) in Japan. The day was established by Ohayo Dairy Products (オハヨー乳業株式会社), a dairy manufacturer headquartered in Okayama City, Okayama Prefecture, which makes many popular pudding products. The date comes from Japanese wordplay: 25 is read as "nikkori" (a big smile), as in "you can't help smiling when you eat pudding." In Japan, "purin" (プリン, from the English "pudding") refers to smooth custard pudding with caramel sauce.

Purin: Japan's Beloved Custard Pudding

Japan's purin is a smooth egg custard dessert with caramel sauce, closely related to the crème caramel of French cuisine. Pudding came to Japan in the Meiji era and is said to have been introduced as "poddingu" in the 1872 cookbook "Seiyō Ryōri Tsū." It spread through Western-style restaurants and cafés before becoming a home favorite. Today it is sold in convenience stores, supermarkets, and patisseries in great variety — from basic cup puddings to artisanal creations.

Convenience Store Sweets Culture

Purin is one of the stars of Japan's convenience store (コンビニ, conbini) sweets culture. Convenience store chains keep a rotating selection of chilled desserts, and pudding is a staple, with each chain offering its own versions. In the 1990s, "nameraka purin" (silky pudding) with a melt-in-the-mouth texture became a hit and a new standard style.

How Pudding Sets

Pudding relies on egg proteins setting when heated, holding the milk's moisture in a smooth gel. Caramel sauce is made by heating sugar to high temperatures until it browns — a process called caramelization — giving it its fragrance and pleasant bitterness. If the custard is heated too hot, small holes called "su" form, so gentle heating below boiling is the key to a smooth finish.

Fun Facts

• Baked vs. steamed: Baked pudding gets a browned, fragrant surface, while steamed pudding tends to have a smoother texture.
• Pudding around the world: Custard puddings with caramel are loved worldwide, including leche flan in the Philippines and bánh flan in Vietnam.