Underwater Scene Cake with Seahorse Couple Topper

Underwater Scene Cake with Seahorse Couple Topper


Learn how to make a cake topper of a couple of seahorses in love and decorate a cake with an underwater theme.

In this tutorial, Chef Yener will take you through all the steps to decorate a 2 tier topsy turvy cake with an underwater theme. Although everything you learn in this tutorial can be used to decorate any sized cake with an underwater theme, not just a 2 tier topsy turvy cake. You will learn how to create seaweed, coral, a sea turtle, decorative waves, sea shells, starfish and seahorses out of pastillage. You will also learn how to assemble some of those elements to make a seahorse couple topper. This tutorial does not cover how to make a mad hatter/topsy turvy cake. Please watch our How to Make a Mad Hatter Cake tutorial to learn about how to make a topsy turvy cake.

Downloadable Course Material

If you would like to approximately match the size of the artwork in the tutorial, print the downloadable files at 100% size. If you require your artwork to be smaller or larger, just adjust the print size accordingly.
Underwater Scene Cake with Seahorse Couple Topper - Course Material
This PDF document contains an actual size front view blueprint, a checklist for the parts that need to be made, guides to make the ferns, coral, waves, turtle and seahorses, as well as reference images of the finished cake.

Introduction & Plan
Tools, Materials, Recipes & Ingredients
Making the Branches
Making the Starfishes
Making the Sea Shells
Making the Coral
Making the Leaves (See Weed)
Making the Waves
Making the Turtle
Making the Sea Horses
Day 2 - Planning
Assembling the Branches
Airbrushing the Blue Parts
Airbrushing the Green Parts
Airbrushing the Sea Horses
Assembling the Sea Horses & Starfishes
Attaching the Topper & Waves to the Cake
Piping the Royal Icing
Assembling the Rest of the Parts
Final Touches
Total Duration

While not everything on this list is absolutely required, these are the things used in this tutorial video. Of course you are welcome to find alternative ways of doing things and we would love to hear if you've discovered an easier method or better tool to achieve good results. Please note that some items may be listed as sets, and it is usually recommended to have full sets, it may not be neccessary. In most cases, only one item from a set is actually used in the tutorial. Please watch the tutorial before purchasing any items to make sure you are not buying anything you don't need.
Tools & Materials
Set of Knives Shop Online
Pizza Cutter Shop Online
Preferably large, stable and sharp.
Airbrush Set Shop Online
Modelling Tools Shop Online
Minimum of 8 pieces recommended.
Marzipan Knife Shop Online
Powder Shaker Shop Online
Preferably with small holes.
Rolling Pins Shop Online
Preferably with no scratches or dents.
Hand Towels
Ensure fibers are not loose.
Oil Cooking Spray Shop Online
Colour should be as light as possible to prevent discolouration in the fondant or pastillage.
Set of Scissors Shop Online
Round Nozzle Set Shop Online
4mm & 8mm
Small Brush in Water
Ensure that brush bristles are not loose.
Digital Scale
Preferably with 1 gram increments.
Almond Dragees Shop Online
Liquid Food Colours Shop Online
green, brown, orange, yellow, black, blue
Flat Tray
A3 size
A strong flat tray that doesn't bend which is about 2mm or 3mm thick. Can be aluminium or plastic. Should be light in weight.
Thin Cardboard
Post card or business card size
A thin card board like the ones that make a white cake box, a post card or a business card.
Recipes & Ingredients
White Chocolate Wikipedia
Chocolate is a typically sweet, usually brown, food preparation of Theobroma cacao seeds, roasted and ground, often flavored, as with vanilla. It is made in the form of a liquid, paste, or in a block or used as a flavoring ingredient in other sweet foods.
Other Required Items
2 Tier Cake
Coated with fondant, centre support


  1. Joelma says:

    I love it! Your work is a great inspiration! Thank you very much for your commitment!

  2. rdvrav96 says:

    I just want to say that I love your videos! I have only been doing cakes since Christmas and I have learned so much from you. I can’t wait to work on things every week. I couldn’t even frost a cake before and now I am making such beautiful things from scratch. Thanks again!

  3. Gaynor Mitchell says:

    What a great tutorial. I made this cake for my friend’s wedding. Bride and groom were astonished! They absolutely loved it. Thanks for continuing to make accessible and achievable cake art.

  4. Cathy Lavelle says:

    I’m really enjoying this tutorial. However, I don’t have an airbrush. Is there another way that I can achieve the colouring effects? Could I brush on dusts and layer the colour that way? Also, how did you colour the pastillage “coral”? PS You are a wonderful teacher!

    1. Serdar Yener says:

      Hi Cathy Blue shade on the cake you can achieve by using clean sponge . Dilute the the colour and apply on the cake with small touches at a time and try to make even as possible. If it is not even take it as texture.Colour on seahorses use little brush do it like water colouring. I mix my pastillage with colour before place in the microwave for the corals. Thanks and good luck. I recommend you to get an air brush. Look at our tools at resources section

  5. Strudel says:

    I have just finished watching this truely gorgeous tutorial. You are wonderful Chef. I hope you are fully recovered from the spider bite. Two years ago I was bitten by a spider all over my face and eyes, it looked just like someone had thrown acid on my face and it was so very painful.
    I will try and make the seahorses by the piping chocolate method so I can combine them with the fish tutorial.I don’t know if it will work in the same way as pressure piping with royal icing. I guess the only way to find out is to try it and see. May be I will not be able to get the marking right. Your advice would be appreciated.
    Stay safe Chef, God bless you too always, thank you for everything you teach us. x

    1. Serdar Yener says:

      Hi Strudel I did quite a bit of royal icing piped figurines , it works . Few things I will recommend; pipe in stages and give enough time in between so things are not getting too flat. Do all in white and air brush with light colours next day. Don’t thing about Chinese brush painting, Black ink and chocolate has relation but not royal icing. Good luck

  6. Denise Bitchener says:

    Gorgeous! I now have to buy an airbrush because the colour graduations are brilliant.

    1. Serdar Yener says:

      We hope you arrived home safely . Thanks for the visit again.

  7. heather hogan says:

    This was the best tutorial I have every seen. You are the greatest. I will have to try this cake

  8. Lucia Suciu says:

    Thank you so much!

    1. Serdar Yener says:

      You are welcome.

  9. Manya Unusyan says:

    Awesome! I like the seahorses and the turtle . Your teaching is very valuable and helps me to create beautiful cakes. I am very happy to be a member for this great website. Thank you so much!

    P.S. I hope you feel better and I am sorry to hear what happened to you.

    1. Serdar Yener says:

      Thank you Now I can see again

  10. Lisa Kaatman says:

    Any idea as to when this will be released? I have a cake coming up and I’d just LOVE to use the seahorses!! Please advise.

    Thank you!

  11. Trisan Boudreau says:

    Can’t wait!

  12. Kerry Lacey says:

    I can hardly wait for this one 🙂

  13. Cakemaker says:

    I’m looking forward to this ……

  14. Luz Elena Olarte says:

    Estoy muy ilusionada y lo espero con emoción, gracias un abrazo.

    GOOGLE TRANSLATION: I am very excited and look emotion, thanks a hug

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Sea Theam in White Chocolate Cream Cheese Icing620160214_235624mermaid cake/ oceanI go it!!!So happy!Doris Austria
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