This constructions site cake was done for my son's 5th birthday, his current interest being big trucks and construction equipment. I started with a half sheet cake (Wilton 1/2 sheet pan) and baked a half chocolate, half white cake mix.
Using regular white buttercream icing I frosted the entire cake, making some landscape details like holes in the ground out of the icing. After allowing the icing some time to form a slight crust, I then took my decorating brushes to paint the surface with browns, yellows and greens. This can be faster and easier if you own an airbrush, but if not a paintbrush, gel colors, and warm water work well.
After adding the ground color I took cake crumbs that I had dried up in the oven and ground in the food processor, and scattered them about the surface. The borders are iced with chocolate buttercream, the top with some regular white added for contrast. I also added some great "rocks" that were actually chocolate candies found at the local grocery store, shaped like rocks. The crumbs and "rocks" are key. My son was so impressed, he believed they were real rocks and dirt!
Write a greeting and add the trucks/cars/figures of your choice. This surface would work well for a farm, monster trucks, animals, many different scenes, and you could add a lake with colored decorating gel.
I made this construction site cake for my son's fourth birthday. We designed it together after I perused many, many pictures of construction site cakes. The trucks and workers were purchased as a set by Wilton.
The base cake was a 9x13 chocolate cake. I cut a small hole out and used that piece and some cupcakes piled up to make a hillside. I iced it all with frosting dyed brown by using 5 drops of red, 6 drops of yellow, and 3 drops of green food coloring(used a little over one batch of frosting just for this part).
We crushed Oreos to use as fill dirt in the hole, fill the dump truck, and scatter down the hillside. The "concrete" is frosting dyed gray by using 2 drops each of red, yellow, blue, and green food coloring. I used yellow frosting to pipe out the lines on the roadway and the borders and lines around the sides of the cake.
Small construction cone candles were added just before serving (ordered from an online birthday supply source). The best part about a cake like this is that construction sites are supposed to be messy, so any artistic flaws are easily hidden!
This Construction Site Cake is a 12x18 sheet cake I made for my son's 3rd birthday party. It was VERY easy, and everyone was extremely impressed. I frosted the whole cake with chocolate frosting. I then outlined the road with knife. I used the Wilton grass/hair tip to make the green grass.
Then, I put black icing down for the road (warning, black icing doesn't taste so good!) with yellow lines. I then carved out a hole that I filled with crushed Oreos for the digger, and put a mound of Oreos as a pile of dirt for the dump truck. The excavator is putting some mixed crumbs onto the road. I sprinkled some graham cracker crumbs around.
As a final touch, I placed some crushed Oreos around the side (just by pressing them in with my hand - it was a little messy, but that's ok for under a construction site!) and then pressed in some gummy worms. I added some plastic trees and signs I bought at the store. It took about 45 minutes to decorate and everyone thought it was store bought!