Eating alone in Seongsu: four-palm mushroom slice at Pizza Slice Seoul
In short
Pizza Slice Seoul is a slice pizzeria on the basement level of 159 Achasan-ro, near Seongsu Station in Seongdong, Seoul. Visiting alone, the writer ordered one mushroom slice with a coke, buffalo wings (snack size) and fries, dropping the plan from two slices to one because a single slice is about the size of four palms put together. Ordering by the slice, a sink inside the shop and sauces on every table make Pizza Slice Seoul an easy solo pizza stop in Seongsu.
Good to know
- Location
- 159 Achasan-ro, basement level, Seongdong-gu, Seoul
- How to order
- Available by the slice
- Order that day
- Mushroom slice, coke, buffalo wings (snack), fries
- Buffalo wings serving
- Snack size, 4 pieces, served with celery and mayo sauce
- Slice size
- One slice is about the size of four palms put together
- Conveniences
- Sink inside the shop; hot sauce, ketchup, pepper and salt on every table
- Takeout
- Fries come in a paper cup, so leftovers can be carried out as they are
as written by the visitor on Sep 20, 2026
#PizzaSliceSeoul, I went!! I found this place while looking for a solo-friendly pizza spot in Seongsu, and it turned out to be exactly that — somewhere you can enjoy pizza alone without any awkwardness. The vibe and the food were both great, and I later realized it's connected to a café called T Coffee that I'd visited a while back, haha. If you're ever stuck on what to pack for a picnic at Seoul Forest, grabbing pizza to go from Pizza Slice Seoul would be perfect.
Where is Pizza Slice Seoul in Seongsu?
Pizza Slice Seoul is on the basement level at 159 Achasan-ro, Seongdong-gu, Seoul. It's a slice pizzeria you can walk to from Seongsu Station, and true to its name, you can order by the slice.
The classic pick for solo pizza in Seongsu, Pizza Slice Seoul! As the name suggests, you can order by the slice, which makes it perfect for visiting alone without any pressure, haha.
Sitting alone at Pizza Slice Seoul, with a sink inside the shop
The atmosphere at Pizza Slice Seoul is casual but stylish, so sitting by myself didn't feel awkward at all. If you're looking for a solo pizza spot in Seongsu, give it a try, haha. It's also a great pizza place to grab takeout from before heading out for a picnic.
There's a sink right inside the store so you can wash your hands without going all the way to the restroom, which was nice since you end up eating the pizza with your hands anyway.
Pizza Slice Seoul menu
I originally planned to eat two slices, but seeing them in person, I was overwhelmed by the size... this was nothing like the regular pizza slice I had in mind! Maybe about the size of four palms put together?
What one person ordered
What I ordered was a mushroom slice, a coke, buffalo wings (snack size), and fries.
Mushroom slice: why two slices became one
Behold the overwhelming size of the mushroom slice. I originally planned to eat two slices, but changed my plan after seeing the real thing, lol. One slice was so much bigger than I expected that I ended up ordering just the one.
The mushrooms were genuinely piled on generously, so I could really feel that mushroom texture with every bite, haha. Cheese and mushroom together — need I say more. Delicious. Even just one slice left me completely full. Seongsu's best pizza spot has to be here!! Can't believe I only just found out about Pizza Slice Seoul now... Once the weather warms up, I want to get it to go for a picnic by the Han River.
Fries: crispy and not too salty
The fries were crispy and not too salty. The outside was fried nice and crisp, and since they weren't salty, I found myself picking them up one after another without hesitation... They come in a cute paper cup, and although it's unlikely, if there's any left over, you don't need to ask for it to be packed separately — you can just pick it up and walk out, which is convenient.
On top of that, every table had an assortment of sauces — hot sauce, ketchup, pepper, salt — which I loved. I actually go through a lot of ketchup and always ask for more, but at Pizza Slice Seoul each table has a jumbo ketchup bottle, so I could eat comfortably without asking.
Buffalo wings (snack): four pieces, crisp outside and juicy inside
The buffalo wings exceeded expectations — genuinely delicious. I ordered them without expecting much, but after tasting them I was completely won over. There was a hint of spiciness that actually made them even better, and the skin was fried crispy, so the texture was excellent too. The definition of crispy outside, juicy inside!!
They came out as four pieces, so I could keep enjoying them all the way to the last bite, haha. If I go again, I'll probably order this exact combo again...
Ah, if you order buffalo wings, you get celery and mayo sauce. The celery was so good... I should go order celery again sometime soon. The mayo sauce was also great, so I dipped the fries in it too, haha.
Is Pizza Slice Seoul good for eating alone in Seongsu?
Pizza Slice Seoul lets you order by the slice, which makes it great for eating alone — instead of ordering a whole pie, I could mix and match exactly the flavors I wanted, and I was so satisfied! The mushroom-loaded mushroom slice I had today is something I'd order the exact same way next time. And I'll pair it again with the buffalo wings and crispy fries in the same combo. If you're looking for a solo pizza spot in Seongsu, definitely give this place a try, haha.
Where it is
159 Achasan-ro, basement level, Seongdong-gu, Seoul, South Korea서울특별시 성동구 아차산로 159 지하1층
