Cake for 30 people: size, servings and budget

There isn't just one answer.

Let's take two real examples.

One professional says that a layer cake 20 cm in diameter and 15 cm tall can give around 30 thin slices.

Another offers a tall cake 15 cm in diameter and 20 cm tall to serve 30 slices.

Same number of people.

Very different dimensions.

Why?

Because the volume of the cake and the way it's cut matter as much as its diameter.

Rough guide

These dimensions are guidelines, not a universal standard.

The baker should confirm the number of servings that matches their own recipe.

For a classic layer cake, you'll often come across sizes around:

20 cm

Possible if the cake is tall enough and the servings are suitable.

25 cm

Gives more servings at a more standard height.

Two stacked diameters

For example:

a small top tier + a wider bottom tier.

This is especially worth considering when the look really matters.

But watch out for a very common mistake:

A very tall 20 cm cake can hold more cake than a much shorter 25 cm one.

So the right question to ask the professional is:

"Which configuration guarantees me 30 servings with your cutting method?"

Both are possible.

And the choice is as much about looks as practicality.

A large layer cake can work perfectly well.

Advantages

• simpler design;
• often easier to transport;
• modern look;
• fewer structural constraints.

For some events, that's more than enough.

From around 30 servings, some cake designers offer two-tier creations.

One professional, for example, lists two-tier layer cakes from 30 servings.

Advantages

• more spectacular result;
• more height;
• "centrepiece" effect;
• the option to play with two sizes.

It's particularly well suited to:

• a milestone birthday;
• a christening;
• a baby shower;
• an engagement;
• a small wedding.

But the structure can take more work:

• supports;
• reinforcements;
• assembly;
• decoration;
• transport.

So ask the baker to compare:

a 1-tier version

vs

a 2-tier version

for your budget.

30 people give you plenty of options.

This is probably the most versatile option for a birthday.

It lets you personalise:

• colours;
• theme;
• age;
• first name;
• flowers;
• fruit;
• macarons;
• toppers;
• decorations.

And it's tall enough to become a real decorative feature in its own right.

→ Read: Price of a layer cake

Celebrating something special?

Cake design lets you go much further:

• film theme;
• football;
• travel;
• flowers;
• jungle;
• princess;
• gaming;
• luxury;
• cars;
• a character;
• a personal passion.

For 30 people, you have enough volume to create something really eye-catching.

But the more complex the design, the higher the budget.

→ Read: Price of a custom cake

For a birthday, it makes a lot of sense.

Turning 30?

Your design is literally sorted:

3 + 0.

A number cake also lets you mix and match:

• fruit;
• macarons;
• flowers;
• chocolates;
• biscuits;
• colours.

One thing to bear in mind, though: the number of servings depends on the size and thickness of the numbers.

→ Read: Number cake: price, size and number of servings

If you care more about the pastry itself than the cake design, a large entremets (a layered French mousse cake) can be an excellent alternative.

For example:

• fraisier (strawberry and cream);
• chocolate;
• red berries;
• praline;
• lemon;
• tropical.

The dimensions will be different from those of a layer cake.

A fraisier sold for 30 people might, for example, measure around 30 × 40 cm.

Which shows once again why comparing diameters alone doesn't make much sense between two different families of cakes.

A solution I particularly like for 30 guests:

a smaller centrepiece cake

matching cupcakes

You get:

• a beautiful cake for the photos;
• enough servings;
• a more generous-looking table;
• several flavour options.

It can also make serving easier.

No need to perform surgery on an enormous cake in front of 30 people.

The price varies hugely depending on the type of cake.

A classic bakery cake can cost a lot less than a fully custom cake design.

For bespoke creations, several French professionals currently list very different starting prices.

For example:

• layer cake from €7 per serving for one tier at one professional;
• two tiers from €7.50 per serving at the same baker;
• cake design around €9 to €12 per serving at another professional.

Simulation for 30 people

Please note:

this table is a mathematical simulation.

It is not a "national average price".

Decorations, modelling, flowers, delivery and special requests may be charged on top.

If you're looking for a truly personalised cake, I'd think in three levels.

Clean, minimal decoration:

• colours;
• lettering;
• smooth finish;
• small decoration.

The budget will generally be lower.

For example:

• a theme;
• a topper;
• several colours;
• fruit or macarons;
• small personalised decorations.

For example:

• two tiers;
• sugar flowers;
• figurines;
• modelling;
• 3D elements;
• lots of detail.

Here, the time involved can change the quote considerably.

The best reflex:

tell the baker your budget.

For example:

"There are 30 of us and my maximum budget is €230. What could you offer me in this style?"

You'll usually get a far more useful answer than:

"How much is this Pinterest cake?"

Create an interactive Taasty Cakes tool here.

Number of guests

30

Occasion

Birthday

Type

Layer cake

Level of personalisation

Simple / Personalised / Very elaborate

City

[Paris](/patissier/paris)

→ Estimate my budget

Result:

Indicative range

then immediately:

Bakers matching your project

See the bakers

Not always.

You have 30 guests on the list.

Great.

But ask yourself a few questions.

If you also have:

• cupcakes;
• macarons;
• fruit;
• cookies;
• a dessert table;

not everyone will necessarily take a big slice.

After:

a starter

• a main course
• cheese

servings can be smaller.

At 4 pm, in front of 30 people who've been waiting for afternoon tea since midday?

That's a slightly different story.

Depending on their age, servings can be smaller.

An important question.

Some people want to finish the cake exactly.

Others consider that a successful birthday necessarily involves an extra slice the next morning.

We won't judge anyone.

For an event where the cake is the main dessert, ask the professional to plan 30 real servings that match your type of service.

You can also allow a small margin if:

• the number of guests isn't final;
• the servings need to be generous;
• you'd like to keep a few servings back.

But there's no point ordering 40 servings "just in case" without a reason.

Simply explain the context to the baker.

Cutting becomes particularly important.

A tall layer cake doesn't have to be cut like a traditional tart.

With poor cutting:

30 planned servings

can turn into:

18 enormous slices

and 12 people silently staring at an empty plate.

Not ideal.

Ask the baker:

"Can you show me how to get the 30 planned servings?"

Some professionals provide a cutting guide directly.

With a tiered cake, it can sometimes be possible.

For example:

Tier 1

Vanilla – raspberry

Tier 2

Chocolate – praline

But it depends on the professional.

Not all of them offer several flavours in the same creation.

For a single large cake, choosing a fairly crowd-pleasing flavour is often simpler.

A few popular, easy-to-understand pairings:

Vanilla – raspberry

Fresh and fairly crowd-pleasing.

Chocolate – hazelnut

Very indulgent.

Vanilla – red berries

A classic.

Chocolate – caramel

For those who've decided that, just for today, moderation can wait until Monday.

Vanilla – mango – passion fruit

Fruitier and more exotic.

Pistachio – raspberry

Bolder and very indulgent.

→ Read: Which flavour to choose for a birthday cake?

For a custom creation, avoid leaving it until the last minute.

Lead times vary enormously between professionals.

One cake designer we consulted currently quotes around 10 days of production for their custom cakes, while another recommends getting in touch no later than three weeks before the event.

For a complex cake or a busy weekend:

the earlier, the better.

Start your search as soon as you know:

• the date;
• the city;
• the approximate number of guests.

To get a useful quote quickly, send straight away:

Event: birthday Date: 12 December City: Lyon Number of people: 30 Type: layer cake Style: white, pink and gold Flavour: vanilla/raspberry Budget: around €220 Delivery: wanted Inspiration: 1 or 2 photos

The professional can then tell you straight away whether your request is doable.

You now know:

the number of guests

↓

the type of cake

↓

your budget

↓

your style

All that's left is to find the professional who can make it.

On Taasty Cakes, browse bakers and cake designers by city, look at their creations and send your request.

Display dynamically only the pages that are actually published:

→ Birthday cake in Paris

→ Birthday cake in Lyon

→ Birthday cake in Marseille

→ Birthday cake in Bordeaux

→ Birthday cake in Toulouse

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