Barbie Birthday Cake!

This Ariel Barbie birthday cake was a huge hit with Sprite and it was super simple! 

Simple kids birthday cake ideas are amazing! Effective and easy to make they are the ultimate way to make a birthday - for kids, a birthday is often all about the cake. For some reason it is the main thing they remember so the pressure is on!

'Ariel Barbie Birthday Cake''Ariel Barbie Birthday Cake'

A surprisingly simple cake to make the outside looks professional and the beautiful inside is a real hit with the kids. Complete with birthday cake pictures this ultimate guide has all you need to make a great kids birthday cake design.

This cake has Ariel as the princess but any doll (Barbie, Tinkerbell etc) could be used. A new doll would be a lovely keepsake after the party. Just remember to remove all her clothes before putting her in the cake!

Note: This Barbie birthday cake can’t be classed as ‘healthy’ - in fact it is a sugar laden surprise! It is a party cake however and much as I love to eat healthy, my kids LOVE to not - and I don’t want to stop them trying things and making their own choices. Weirdly, after following a low/no sugar diet most of the time, they often find real sugar cakes too sugary. Then they stop eating of their own accord. I believe experiencing this helps them to make their own mind up about what is and what is not good. After all, I want them to eat well for the rest of their lives, not revolt the minute they leave my household! 

If you want to make it healthy just use a healthy recipe such as this delicious sugar free carrot cake (although you will still need to use fondant for the decorating).

How To Make This Simple Barbie Birthday Cake

You need:

  • Lots of cakes in rainbow colors - I used a traditional (but reduced sugar) sponge
  • Butter Icing
  • 750 g Fondant Icing
  • Royal Icing
  • Edible Pearls
  • Dried coconut coloured green

Sponge Cake Recipe (this will do 6 half cakes). 

  • 450g (16oz) self raising flour
  • 300g (16oz) caster sugar
  • 450g (16oz) soft margarine
  • 8 medium eggs

It is possible to do all these cakes with only 2 tins. Lining the tins with grease proof paper means that it is easy to remove the cake and reuse the tin without washing (turn the grease proof paper over and reuse that too...minimal effort for so many cakes).

Barbie Birthday Cake Method

  1. Heat the oven to 180°C (350°F or gas mark 4). Grease and line the tins (8 inches (20cm) diameter round, shallow tins).
  2. Add sugar and margarine to a bowl and beat until fluffy.
  3. Add eggs one at a time and beat after each addition.
  4. Fold in the flour gently. Stir until the mixture is smooth.
  5. Split the mix into 6 separate bowls (7 if you want to do an indigo layer). 
  6. Add a few drops of liquid food colour (Red, orange, yellow, green, blue, violet/purple) to each bowl of cake mix and stir it in. Initially you may think that you didn't add enough colour because the mix is still very dull looking. However, after cooking, the colours became a lot more vibrant! If you want to do an indigo layer (between blur and violet/purple then remember to separate into 7 bowls).
  7. Cook each colour mix separately in a cake tin lined with grease proof paper. Each cake takes about 15 minutes to cook (risen, firm and skewer comes out clean).
  8. Turn them out to cool separately on a wire rack.
  9. When they are cool decorate or wrap each cake in foil and store them in the fridge for decorating the next day.

Note: The cake featured is made using 2 tins, one with a hole in the middle.  I thought I might need the holes for the princess. I was wrong. In retrospect it would be better to have all the cakes as full cakes with no holes!


Barbie Birthday Cake Icing

You need:

  • Butter icing (large batch)
  • Fondant icing (Approx 750g)

Icing the Barbie birthday cake takes around an hour. 

Mix a big batch of butter icing to start.

Butter icing

  • 200g (8oz) softened butter or margarine
  • 450g (16oz) icing sugar (confectioners sugar)
  • 2 tablespoons any milk
  • 1 teaspoon vanilla essence
  • few drops of food colouring if desired
  1. Add the butter/margarine to a large bowl and beat until fluffy.
  2. Put all the other ingredients in the bowl and start by gently stirring (if you use a beater initially the icing sugar will create a huge icing sugar cloud!).
  3. When things are starting to mix then use an electric beater if you want.
  4. Put the purple cake onto the cake board, ice the top with a spoonful of icing then put the next cake on and repeat until red at the top. Violet/Purple - Blue - Green - Yellow - Orange - Red
  5. Ice the outside of the whole cake with the butter icing mix. The fondant icing needs something to stick to. Don't be too particular about this step, you won't be able to see the icing.
  6. Use a sharp knife and cut one hole in the cake from the top to the bottom slightly towards the front of the cake. 
  7. Take Ariel, Barbie or whoever and wrap in cling film from her toes to her armpits. Wrap her hair as well to protect it for now. I used foil as it stays well. Place in the hole!

Now Ariel is in the cake with a very big back to her dress. Definite princess!

Note: In this cake because there were holes already from the choice of cake tin only the bottom 3 layers needed cutting. When I came to place Ariel in the cake I realised that the holes at the top were too big. I had to put the cake I had cut out from the bottom layers in to fill in the top holes. Lesson learnt, all the cakes need to be whole!

Fondant Icing This Barbie Birthday Cake

The easiest fondant icing to use is shop bought. It is simple to roll out and manipulate. 

You need:

750g Fondant Icing (White)

  1. Split the fondant icing into 3 pieces (2 equal size and one much much smaller). One piece for the front of the dress, one for the back and small piece for the bodice. 
  2. Roll out the back of the dress into a long oval. Place it over the back of the cake behind Ariel, letting the excess ripple as it falls. 
  3. Roll out the front piece into another oval and place it over the front of the cake. Use a sharp knife to trim the icing around her waist (If there is a small hole at the bottom on each side, reroll a little of the icing from the trimming and lifting the placed pieces put it inside. It looks a bit messy but that is solved later.).

For the bodice you need to be a bit more organised. Roll out the icing and cut it into the shape below. 

Place it on Ariel, over her front first, wrap around to the back and fasten it together. If it tries to fall down you need to use a little water to make it stick together at the back and firmly press it all the way round her body.

If the back/top of the dress looks messy then re-roll the excess to make another oval to put over the top and make it look nicer.

Finally time for the trimmings! These are what make the cake. Make some pink royal icing using the recipe below. Very simple to make, the cream of tarter stops it setting to complete rock.

Barbie Birthday Cake Pink Royal Icing & Trimmings

  • 300g (10oz) Icing Sugar (Confectioners Sugar)
  • 2 egg whites
  • 1/2 teaspoon Cream of Tartar
  • Food Colouring (Pink/Red)
  • Edible Pearls or similar
  1. Beat the egg whites until slightly frothy.
  2. Add icing sugar gradually and mix until sugar is incorporated and the mixture is shiny.
  3. Turn up speed to high and beat until mixture forms stiff glossy peaks (approx 5 minutes)
  4. Add food colouring if desired. The icing then needs to be used immediately as it start to hard straight away when exposed to air.
  5. Put it into a piping bag with a flower type tip.
  6. Ice along every seam of the dress, around the bottom and the top. Where fondant icing joins are a little messy make flowers by squeezing a little more icing in one spot. Decorate the bodice once you are used to how it flows.
  7. You can then decorate further using pink and white pearls on all the flowers and round the bodice top....very princess!
  8. Nearly done!
  9. Ice around the edge of the cake board to help make it more complete and fill in the board with 'grass' (dried coconut coloured with green food colouring). To make the coconut green, put the coconut in a ziplock bag, pour in a few drops of green food colouring, seal the top and shake it until the colour has spread. Add more colour until it looks right.
  10. Now the princess looks like she is taking a walk on the grass! Adding the candles seems like a shame, maybe it could be done at the party. Be very careful not to put them too close to her hair!

Some people worry about using uncooked egg whites and meringue powder or egg white powder is a substitute. 


One Ariel Barbie birthday cake with a hidden rainbow surprise. Super simple kids birthday cake ideas can be difficult to find….I hope you enjoy this one.

'Rainbow Surprise Ariel Barbie Birthday Cake''Rainbow Surprise Ariel Barbie Birthday Cake'

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