Celebrate your child's birthday with her favourite characters from the popular Nickelodeon cartoon SpongeBob SquarePants. Rather than spend a large amount of cash on licensed items and shaped cake pans make a homemade SpongeBob cake for much less. Add a touch of creativity to a basic cake mix and icing and create a one-of-a-kind treat the birthday girl will love. A homemade cake saves you money and adds a sentimental element into the birthday party.
Bake your favourite flavour of boxed cake mix according to package directions. Bake in a 13-by-9 inch baking pan for a rectangular shaped sheet cake. Allow the cake to cool completely and transfer to a tinfoil-covered sheet of cardboard at least one inch larger than the cake on all sides.
Tint your favourite icing flavour to mimic the look of the ocean and cover the entire cake. Use a prepared mixture from the grocery store or make homemade frosting using one of the recipes found under resources at the end of this article. Apply blue food colouring to the icing until you reach the desired colour of ocean to represent Bikini Bottom. Apply evenly to the entire surface area of the cake.
Sprinkle brown sugar or graham cracker crumbs on the bottom quarter of the cake. This represents the sandy beach in Bikini Bottom. Gently press the brown sugar or graham crackers into the icing with a butter knife. Use a toothpick to mark a quarter of the cake as an outline when sprinkling your sand.
Cut the back half of a pineapple off from top to bottom, hollow out the inside and press on the cake. According to the theme song SpongeBob "lives in a pineapple under the sea." Hollow out the inside with a knife to attain as weightless a pineapple as possible. Gently press the half pineapple shell into the top left corner of the cake with the greenery hanging over the edge of the cake.
Create a SpongeBob character using various candies, snacks and icing placed on the cake. Tint icing with yellow food colouring and draw a rectangle using a cake decorating tip and fill in with the icing to resemble SpongeBob's body. Use black liquorice or chocolate snack cakes for his legs and arms. Apply his eyes using edible eyes from a local craft or baking store. Insert a toothpick centred below his eyes and use a candy banana for his nose. Use red liquorice string to make his mouth and add two white-coated pieces of gum for his teeth.
Use cake decorating gel to draw free form flowers in purple, white and green and a happy birthday message on the tinfoil or sand. Fill in the empty spaces on the cake with flowers. Try drawing jelly fish with the decorating gel if you feel comfortable doing so.
Pipe icing around the top and bottom perimeter of the cake. Use a cake decorating tip in any style you wish to pipe the perimeter making the edges of the cake clean and attractive. Use the blue tinted icing for the piping.