How to make planet-shaped cakes

Updated November 21, 2016

For your next party, make a cake shaped like something other than the traditional rectangle, square or circle. For example, using ball-shaped, moulded cake pans and frosting, you can create a cake that will look like a planet. Alternatively, use several smaller ball-shaped moulds to make all the planets in our galaxy. Serve your finished cake or cakes for a planet-themed birthday or Earth Day party.

Prepare a cake mix according to package directions. Alternatively, make a cake from scratch using your preferred recipe. Although you can use any type of cake, pound cake works the best.

Rub the inside of a three dimensional sports ball cake pan using vegetable oil. Let the mould sit for three to five minutes. Wipe the excess oil out of the mould using a paper towel. Sprinkle the inside of the mould with flour. Shake the excess flour of the mould.

Pour the cake batter into the mould according to mould directions. Different moulds have different directions, but most instruct you to pour the batter into one side and the place the other half of the mould on top.

Bake the cake in an oven preheated to 176 degrees C for 50 to 60 minutes. Remove the cake pan from the oven and place it on a cooling rack. Allow it to cool for five to 10 minutes. Remove one side of the cake mould. Leave it to cool another five minutes. Put the removed part of the mould back on, and flip the cake over. Remove the other part of the mould. Let it cool for another 30 minutes.

Take the cake out of both parts of the mould. Make sure the cake is completely cool before proceeding. If the cake still warm, leave it another 30 minutes to bring it to room temperature.

Place the round cake on a serving platter. If necessary, use a serrated knife to remove a small wedge from the bottom of the cake to keep it from rolling.

Cover the cake with coloured frosting. Decorate the cakes using coloured frosting in a piping bag. Alternatively, fill a plastic zip top bag with coloured frosting and pipe the details on.


Use small cake moulds to make all the planets. This allows you to make all the planets in small, manageable sizes. For the planet Mercury, use grey frosting. For Venus, use orange and yellow frosting. For Earth, use blue and green frosting. For Mars, use red frosting. For Jupiter, use sand frosting and add varied bands around the cake. Include a large spot on the cake, as well. For Saturn, use tan frosting. To create the rings, cut the rings out of cardboard and attach them to the cake with wooden skewers. For Uranus and Neptune, use blue frosting. Alternatively, use any colour frosting desired to create a unique planet. To add a marbled look to the planets, use an airbrush. Alternatively, use coloured, rolled fondant to cover the cakes.

Things You'll Need

  • Cake mix
  • 3-D sports ball cake pan
  • Vegetable oil
  • Flour
  • Cooling rack
  • Serving platter
  • Serrated knife
  • Frosting
  • Piping bag
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