Slab Cake Sizes, Dimensions and Servings: Complete Guide

Last updated: 7 August 2026

Slab cakes make serving a crowd straightforward. They are easy to portion, available in a broad selection of flavours and can be kept frozen so you only thaw what you need.

Padstow Food Service keeps slab cakes in stock and supplies them frozen unless you ask us to thaw one for you. Order online, by telephone or from our Padstow factory outlet. We are open to everyone, and no ABN is required.

Browse slab and tray cakes

Full Slab vs Half Slab Cake Sizes and Servings

The best size depends on the number of guests and how large you want each portion to be. The table below gives a practical comparison for standard cakes; always check the individual product description because some cakes are pre-sliced or have a product-specific yield.

These figures are guides, not a guarantee for every product. Pre-sliced cakes and slices may have their own stated count—for example, some products are supplied in 14- or 15-piece formats. Portion yield also depends on the shape and size of each cut.

How many people does a full slab cake feed?

A standard full slab cake provides approximately 32 generous servings. For morning tea, functions or catering, it can be cut into approximately 70–72 smaller pieces.

How many people does a half slab cake feed?

A standard half slab cake provides approximately 15–16 generous portions. You can obtain more pieces (approximately 30-32) if smaller portions are suitable for your event.

How to Cut a Frozen Slab Cake

Cutting the cake while it is still frozen helps it hold its shape and gives you cleaner, more consistent portions.

1. Remove the plastic wrap while the cake is frozen.
2. Dip a sharp knife in hot water.
3. Dry the blade, then cut the cake into the required portions.
4. Reheat and clean the knife between cuts for neater edges.
5. Cover unused frozen portions and return them to the freezer immediately.

Do not refreeze any portions that have already thawed. Always follow the storage and serving directions on the physical product label.

How to Thaw a Slab Cake Safely

All cakes are supplied frozen unless you request that Padstow Food Service thaw them. Product-specific handling instructions take priority, so check the label before storage, cutting or service.

Slab Cake Flavours and Styles

The current range includes traditional cakes, mud cakes, tortes, cheesecakes, puddings, brownies, slices and undecorated cakes ready for your own finishing touches.

Popular options include:

• Chocolate, chocolate mud and chocolate brownie
• Banana, carrot, lemon and orange
• Orange poppyseed and white chocolate raspberry
• Salted caramel and caramel slice
• Black Forest torte, tiramisu and chocolate Bavarian
• Peach and mango cheesecake
• Sticky date pudding and apple crumble
• Naked un-iced chocolate and vanilla slab cakes
• Pre-sliced and mixed-flavour catering options

Visit the current slab and tray cake range to see product sizes, flavours, ingredients and allergen information.

When Is a Slab Cake a Good Choice?

Slab cakes are a practical option whenever you need consistent portions for a group, including:

• Birthdays and celebrations: feed a large group without needing a tiered cake.
• Office and school morning teas: cut smaller pieces for easy sharing.
• Functions and catering: portion in advance for fast, consistent service.
• Fundraisers: prepare individual pieces for schools, clubs and community events.
• Cafes and dessert service: thaw only the portions required and add your preferred garnish.
• Unexpected guests: keep unused portions frozen for another occasion.

Where to Buy Slab Cakes in Sydney

Padstow Food Service keeps slab cakes in stock for online ordering or collection from our factory outlet at Shop 2D, Arab Road, Padstow NSW 2211.

Refrigerated and frozen delivery is available to most Metro Sydney suburbs. Delivery eligibility and fees depend on the destination postcode, and some locations are marked “We Do Not Deliver To This Location.” Check delivery availability and fees for your postcode before ordering.

Everyone is welcome. Households, businesses, caterers, schools, clubs, cake decorators and community groups can all order, and no ABN is required.

How to Order a Slab Cake

1. Browse the slab and tray cake range.
2. Choose your cake and add it to your cart.
3. Select pickup or delivery and choose your preferred date.
4. Complete checkout and tell us if you would like the cake thawed.

You can also order or ask a question by calling (02) 9792 2170, emailing sales@padstowfoodservice.com.au, or visiting the Padstow factory outlet.

Frequently Asked Questions

What is a slab cake?

A slab cake is a large, flat, rectangular cake designed to be cut into individual portions. It is commonly used for birthdays, morning teas, functions and catering.

What size is a full slab cake?

A standard full slab cake from Padstow Food Service measures approximately 30 cm × 40 cm, unless the individual product states otherwise.

What size is a half slab cake?

A standard half slab cake measures approximately 30 cm × 20 cm, unless otherwise stated.

How many people does a slab cake feed?

A full slab provides approximately 32 generous servings or 70–72 smaller catering pieces. A half slab provides approximately 15–16 generous portions, with more possible when cut smaller. Check individual products for specific yields.

Are slab cakes supplied frozen?

Yes. Padstow Food Service supplies slab cakes frozen unless you request that we thaw the cake for you.

Should I cut a slab cake frozen or thawed?

Cut the cake while it is fully frozen using a sharp knife dipped in hot water. This helps produce cleaner, more consistent portions.

Do I need an ABN to buy a slab cake?

No. Padstow Food Service is open to everyone, and no ABN is required.