Lisa makes many car cakes for her clients and teaches a popular class on the topic. Here is how she creates a car out of cake.
Bake a 12”x18” cake 2” high. Cut lengthwise and fill and stack. Wrap with plastic wrap and chill to make the carving easier.
Print out photos of the car from the Internet from all angles – front, side and rear. Find blueprint templates on the Internet (see photo) and increase the dimensions to 18” long. Cut out the templates and put the side-view on each side of the cake and use it as a guide to carve the cake. Use the top template to carve the shape of the hood and trunk. This process is very easy since the template does all the work.
Cut the top template to isolate roof line, Place the template on top of cake to serve as a guide to carve out the cab. The side windows angle up from the lower part of the window to the roof template. Fine tune all the sharp angles, using your car photos as a guide. You can cut out the tires now or wait until after you apply the fondant.
Ice the entire cake with buttercream or chocolate ganache. Chill the cake.
Make a parchment pattern of the entire top cap from the front to rear window. Cut this shape out of thinly rolled black or grey modeling chocolate and cover roof and front and back windows. Trim as needed. Cut two rectangle pieces from the modeling chocolate and apply to side windows and trim as need. At this point the entire top of the cab should be covered in modeling chocolate including all windows.
Impress black modeling to make a grill type pattern. Cut out a piece the size of the front of the car where the grill will show. If the hood or wheel wells have a lot of dimension, cut a piece of modeling chocolate out in this shape and add to the car. All these additions go under the final fondant covering.
Fondant the entire cake and sharpen any corners as needed using the photos as your guide. Tuck the bottom edge under the cake for a clean finish. Use a modeling tool to make impressions for the hood, lights, side door, etc. Use a very sharp exacto knife to cut out the windows and grill. Add the side mirror with a half of toothpick inserted into the cake. Airbrush the entire cake. Paint the front lights silver and the back lights red.
Cut out three 3/16” foamcore boards each 4”x14” and glue stacked on top of each other. Cover with black fondant. Use royal icing to “glue” this to a black fondant covered board. Place the car on top of this, secured by royal icing. Add the tires.