JOC Challenge: Make Tonpeiyaki for Prizes

Just One Cookbook's September 2026 JOC Cooking Challenge is to make Tonpeiyaki, a savory Japanese omelette, for a chance to win one of three $100 Amazon gift cards.

This Osaka-style dish is a weeknight dinner solution, ready in just 20 minutes. It features a silky omelette filled with sautéed pork belly and shredded cabbage, finished with the classic toppings of Okonomi sauce, Japanese mayonnaise, and aonori (green seaweed). The site's creator calls it nourishing and comforting, a perfect fit for the fall transition.

The Dish and Its Appeal

Tonpeiyaki is presented as an ideal recipe for satisfying cravings for okonomiyaki, the famous Japanese savory pancake, but with a lighter profile. By using an egg-based omelette instead of a flour-based batter, the dish is described as naturally low-carb. The key technique is achieving a tender, silky omelette that encases the savory pork and cabbage filling without becoming heavy.

For a vegetarian variation, the pork belly can be swapped for mushrooms, firm or fried tofu, plant-based meat, or other vegetables.

How to Enter the Contest

The challenge is open worldwide. To enter, cooks must follow the official Tonpeiyaki recipe closely, aiming for a final dish that looks similar to the example provided. Entries require two actions: emailing one photo of the completed dish to contest@justonecookbook.com by 12:00 PM Pacific Time on September 30, 2026, and leaving a star rating and comment on the recipe post using the same email address. Only one entry per person is allowed.

Contest Rules and Prizes

Three winners will be selected randomly from all valid submissions using a random number generator. The site emphasizes that winners are not chosen based on the appearance of the dish, but submissions must follow the recipe and meet the entry requirements. The winners will be contacted via email and announced on the challenge post and in the site's newsletter within two weeks after the challenge closes.

According to the FAQ, ingredient substitutions are acceptable for dietary needs or availability, as long as the general recipe instructions are followed. The challenge is a quarterly event held every March, June, September, and December.

Past Challenge Recipes

The JOC Cooking Challenge is a quarterly online event. Past recipes include:

The site encourages participants to share their photos on social media and tag @justonecookbook, though this is not a requirement for entry. Questions about the recipe should be asked on the recipe post itself, while questions about the challenge can be left in the comments section of the challenge announcement.