Cooking Papa

Araiwa Kazumi is your run-of-the-mill salaryman and father. He's also secretly an amazing chef! While his coworkers at Kanemaru Industries all eat out for lunch, he pulls out his lunchbox... It's time for this cooking papa to show off his pro-level cooking skills!

(from Manga Helpers):

Araiwa Kazumi is an energetic salaryman who is able to perfectly manage his responsibilities at work and at home. Kazumi is also a fantastic chef, though many of his coworkers are unaware of it. His wife Nijiko, who works as a journalist, has a bit of trouble making time for her home life. However, she tries to always be a cheerful mother.

With their son Makoto, who is 7 at the beginning of the story, they have a very happy family. This is a story that follows the Araiwa household and their delight with delicious food. Cooking instructions are also often included throughout the story.