“What size cake do I need?” It's the most common question we hear at the studio — and the easiest to answer once you know how serves work.
Here's the same quick reference we use when helping Brisbane families plan birthdays, weddings and everything in between, plus a few rules of thumb for matching the cake to the crowd.
Serves per size — the quick reference
Every cake we make is baked from scratch to order, in these sizes:
| Size | Serves |
|---|---|
| 6 inch round | 4–8 |
| 8 inch round | 12–24 |
| 10 inch round | 30–50 |
| Small heart | 10–20 |
| Large heart | 20–40 |
| Quarter slab | 20–30+ |
| Half slab | 40–60+ |
| Full slab | 80–100+ |
| Single letter/number | 6–16+ |
| Double letter/number | 20–30+ |
| Cupcakes | Boxes of 12, 24 or 48 |
Matching the cake to your guest count
For birthday parties and celebrations, plan one serve per guest — that keeps the maths simple. Twenty guests points to an 8 inch round or a small heart; forty guests means a 10 inch round, a large heart or a half slab.
Weddings are the exception. When a plated dessert is already on the menu and the cake is cut later in the evening, plan for roughly 80% of your guest count — not everyone takes a slice at 11pm. A hundred guests is comfortably covered by around 80 serves.
Milestone birthdays deserve a special mention: letter and number cakes are a favourite way to mark the year. A single letter or number serves 6–16+, while a double — think “21” or “50” — serves 20–30+, which makes them a handy fit for medium-sized parties.
Stuck between two sizes? Go the larger one. Leftover cake keeps well in an airtight container, and no one has ever complained about extra cake. Serving both kids and adults? Count the kids too — at cake time, everyone is equal.
When to go slab or cupcakes
Feeding a big crowd? Slabs are the workhorse. A quarter slab serves 20–30+, a half slab 40–60+ and a full slab 80–100+, and they cut quickly into neat, even portions. That makes them ideal for school events, office morning teas, club presentations and big family birthdays.
Cupcakes solve a different problem — no cutting, no plates, no queue. They come in boxes of 12, 24 or 48, so they're easy to match to class numbers or headcounts, and kids can simply grab one and go.
Two tiers vs one bigger cake
Two smaller tiers and one bigger cake can give you roughly the same number of serves — the difference is the look. Tiers add height and a more formal silhouette, with a natural spot for flowers or a topper; a single larger cake is simpler, easier to transport and quicker to serve.
For milestone birthdays, engagements and christenings, the tiered look tends to win. For relaxed backyard parties, one generous cake does the job beautifully.
One practical note: we recommend delivery for tiered cakes — two stacked cakes travel far better in our hands than in your boot. Delivery is free within 15 km of our Indooroopilly kitchen.
Still not sure?
You don't have to decide alone. Our order form has a “Not sure — help me choose” size option: tell us your guest count and occasion, and we'll recommend the right size when we confirm your order within 24 hours.
In the meantime, browse sizes and starting prices on the pricing page, and pick a favourite from the nine options on our flavours page.