Baking cakes into distinctive shapes is a matter of selecting the right baking container. Spherical cake pans are available for purchase, but it is not necessary to buy new equipment to make cakes in unusual shapes. You can make a cake in the shape of any oven-safe metal, ceramic or glass container. It is also possible to cut frozen sheet cakes into square or circular shapes and build shaped cakes from the pieces, using frosting to bind the sections together. An army helmet cake can be made using a spherical cake pan or a metal bowl.
Grease an oven-safe metal bowl. Pour cake batter into bowl, and bake at 176 degrees Cor 20 minutes or until a thin knife inserted in the middle comes out clean. Allow the cake to cool completely.
Flip the metal bowl over onto a large plate. Shake and tap the sides of the bowl until the cake slides out. Do not shake too hard, or the cake may break.
Open one container of white frosting. Add 30 drops black food colouring to the frosting, and stir with a spoon until the colour is consistent throughout.
Open the second container of white frosting. Add two drops red food colouring, eight drops blue food colouring and two drops yellow food colouring. Mix thoroughly with a spoon so the frosting is dark green throughout.
Frost the entire cake evenly with dark green frosting, using a spatula. Allow to set completely.
Load a spatula with black frosting, and smear it over the green frosting in irregular ovals and circles.
Use different frosting colours to replicate military helmets from different time periods and countries.
Let the cake cool completely before frosting, or the frosting will melt.