I happened to know this cafe when I was net-surfing and visited there the other day.
As you can see on the photo below, I enjoyed yuzu* taste ciffon cake offered with a piece of jelly, some fruits, and fresh cream.
*Yuzu is a kind of citrus fruit, often used for Japanese dishes.
You can choose a piece of cake from about 10 different flavors. A cake set served with a drink, I ordered tea, costs 680yen. They serve other meals such as pasta or doria, I visited there later and ordered past plate. It was also delicious.
The owner says that their cake is available at a cafe in the central municipal library.
The interior of the cafe is very lovely. This photo is a dish my friend ordered. It's a cheese toast set that costed 580yen.
The location of this cafe is in Horikawa-cho. If you go along car-street road from Goryokaku to Mt. Hakodate direction, you can find King store on your left. Turn left and you can find the shop on your right. They menu is written in Japanese and I recommend to go there with some Japanese speakers.
Akiko lives in a city next to Hakodate and loves to drive around Hakodate and surrounding area. I hope people who visit or live in the Southwest area of Hokkaido come to love the area, too. 函館の隣町在住で道南エリアのドライブ大好きAkikoです。道南を訪れたり、住んでいる人が土地を好きになってくれたらなぁ、と思います。