What about a Number 13 Birthday Cake make a one and then a 3 and decorate it with his favourite chocolates and lollies

Depends on what he is into… Favourite sport, favourite movie character, favourite superhero, favourite hobby…

Something different…Cheesecake

Love some of these ideas. I especially like the idea of a Star Wars themed cake which is back in fashion.

Really interesting reading the comments to this!

I love the idea of individual cup cakes made into a cake design – they are really great for a party, as there is no cutting and they look cool too, when different colour icing is used. Enjoy the party!

Star wars, mine craft??

It will depend on what things he is into.
Sports theme are pretty easy. Balls, bats or racquets.
Computer consoles are fun too.

If he likes chocolate, I’d try this recipe, because it’s easy, moist, delicious, and he’d never know there’s beetroot in it.

https://mouthsofmums.com.au/?s=chocolate+beetroot+cake

there are some good comments here

I would do a castle cake!

I made my teen son a Malteaser cake – choc mud with Malteasers all over it as they are his favourite. A pinata cake is always popular with tweens/teens too.

I’d love to see what you did!

I was thinking a skateboard cake would be pretty awesome for that age.

A lot of the kids like rainbow cakes now -you could do one like that with favourite football team colours inside.