Welcome to our June 2025 JOC Cooking Challenge!

Calling all ramen enthusiasts and noodle lovers! Are you ready to cook up the most satisfying ramen right in your own kitchen? This month, we’re making one of the most requested and eagerly anticipated ramen recipes.
This is your chance to shine—so let’s get cooking!
Table of contents
June 2025 JOC Recipe Challenge
Beloved for its rich, milky, and creamy broth, Tonkotsu Ramen is one of the most iconic styles of ramen, both in Japan and around the world. Traditionally, it’s made by simmering pork bones over high heat for many hours.
For this challenge, I’ve developed a simplified yet thoroughly tested method using a pressure cooker, which reduces the cooking time to just 3 hours!
You’ll still achieve the same luxurious, creamy, and intensely flavorful broth—but now, you only need an afternoon to make and enjoy this Easy Tonkotsu Ramen at home.

Before you begin:
Please take a moment to read the entire post and recipe. I’ve included helpful tips and substitutions to ensure your ramen turns out perfectly.
If you have any recipe-related questions, feel free to leave them in the comment section of the recipe post. For any questions about the cooking challenge rules, drop them below. We’re here to help!



The Prizes!
This contest is open to everyone worldwide. We will randomly select 3 winners at the end of the challenge using random.org. Each winner will receive a $100 Amazon gift card.
Everyone who has completed the submission for the JOC Cooking Challenge is automatically entered into the prize draw.
Please note that we will not select winners based on the creations, but you need to make sure your submission meets the scope of the recipe.
How to Join the JOC Cooking Challenge
Make Easy Tonkotsu Ramen and follow the recipe as closely as possible so your final dish will look similar to mine.
To enter for your chance to win the prize (only one entry per person), please complete the following two steps:
- Email us your picture: Send one picture of your final dish via email (contest@justonecookbook.com) before 12 pm PST on June 30, 2025, and;
- Leave an honest star rating and a quick comment on the Easy Tonkotsu Ramen recipe post: Just make sure to use the same email address you used for your photo submission. Your feedback helps fellow home cooks discover well-loved and popular recipes, and it really supports the JOC community. I know it’s an extra step—thank you so much for taking the time!
Make sure to follow these two steps to complete your submission!
Feel free to share your picture on social media and tag us @justonecookbook.
Past Cooking Challenges & Recipes
This is a quarterly online event on Just One Cookbook. We host the challenge in March, June, September, and December. We’d love for you to join us in each challenge! To receive the updates, be sure to subscribe to our weekly newsletter.
- March 2022 – Mosaic Sushi
- June/July 2022 – Shokupan (Japanese Milk Bread)
- September 2022 – Shio Ramen
- December 2022 – Purin (Japanese Custard Pudding)
- March 2023 – The Makanai: Cooking for the Maiko House
- June/July 2023 – Shoyu Ramen
- September 2023 – Cook for Maui (choose one of 5 recipes including Poke Bowl)
- December 2023 – Chocolate Gateau
- March 2024 – Okonomiyaki
- June 2024 – Chicken Teriyaki
- December 2024 – Matcha Checkerboard Cookies
- March 2025 – Yamitsuki Cabbage