This will be your template, so make sure that it’s the same size you want your cake to be. Don’t worry about the details on the guitar, such as the sound hole, tuning pegs, and strings. Focus just on the outline.
After you cut the guitar body out, you’ll use the scraps to make the neck and head of the guitar. If you don’t think you’ll have enough, bake a second sheet cake. Use whatever recipe you want: chocolate, white, marble, etc. You could even use a boxed mix! The larger the baking pan is, the flatter the cake will be. If you want a taller cake, bake 2 sheet cakes. This way, you can stack them instead of cutting them in half.
A cake board is a large, thick sheet of cardboard typically covered in silver foil. You can find it in the baking section of a craft store. Don’t worry about the neck and head of the guitar just yet. Place the template so that you’ll have enough scraps to use for the neck and head.
If you made 2 sheet cakes for a taller cake, do this step twice, once for each cake layer.
Eat the rest of the scraps or save them to make cake pops! Repeat this step if you made 2 sheet cakes for a taller guitar cake.
You’re slicing the cake in half to create 2 thin cakes. Don’t chop it in half lengthwise or widthwise. Skip this step if you baked 2 sheet cakes to make a tall guitar cake. You’ll be stacking them together instead.
If you baked 2 sheet cakes, coat the top of your first cake with frosting. The filling should be thick enough so that you can’t see the texture of the cake beneath it. You should be able to tap it with a spatula and make peaks.
Don’t press down so hard that the frosting gushes out. A light touch is all you need.
Make sure that the cake has completely cooled before you do this, otherwise the frosting will melt. If you’re having trouble frosting the cake, apply a thin coat of frosting first. Refrigerate the cake for 20 to 30 minutes, then apply the rest of the frosting. [7] X Research source
You don’t have to do this if your frosting is smooth enough or if you don’t want to. If the paper towel sticks to the cake, dust the paper towel with powdered sugar first.
Don’t worry about sketching out the strings. Draw the horizontal lines (fret) on the neck, however. Add “painted” designs onto your guitar with shaped cookie cutters. Use cookie cutters or toothpicks to indent these designs onto the body of the guitar.
Make the designs any color you want. Black is a good color for the sound hole, however. Don’t worry about the strings yet. Pipe the fret, however. Black or white are good options.
Use the same color of frosting for the filling as for the outline. For example, if you outline the sound hole in black, use black for the filling. Consider adding outer details, like painted flowers.
Alternatively, cut long pieces of floral wire and use those instead. Remember to remove these before serving the guitar, however. [8] X Research source
Look up pictures of guitar keys online to get an idea of what they should look like. Most keys look a little like flattened ovals. White, black, or gray fondant is a great choice for this. You can also tint the keys silver with cake decorating dust. Alternatively, pipe the keys directly onto the cake board to either side of the head.
