Bake cake. Prepare cake batter following recipe instructions. Bake and cool cake according to pan instructions.

Ice cake. Prepare two recipes buttercream icing following recipe instructions. Using spatula and 1½ cups white icing, ice sides and background of cake smooth.

Tint icing. Combine Lemon Yellow and Leaf Green icing colors to get light green color shown. Combine Leaf Green, Moss Green and Lemon Yellow icing colors to get light and dark sage green icing colors shown. Tint ½ cup icing light green, ¼ cup icing dark sage green and 1 cup icing light sage green using color combinations provided. Using black icing color, tint ½ cup icing black.

Pipe spikes. Prepare decorating bag with tip 3 and dark sage green icing. Using zig-zag technique, pipe spikes on back of dinosaur. Smooth with finger dipped in cornstarch.

Pipe mouth, nostril, eye and nails. Prepare two decorating bags with tip 3. Fill one with black icing, one with white icing. Using black icing, use zig-zag technique to pipe mouth and nostril. Pat down with finger dipped in cornstarch. Using white icing, use zig-zag technique to fill in eye, teeth and nails. Pat smooth with finger dipped in cornstarch.

Pipe stomach. Prepare decorating bag with tip 5 and light green icing. Pipe horizontal lines to fill in stomach and bottom half of tail. Reserve remaining icing in bag.

Pipe outlines. Using reserved light green icing, pipe outline around nostril. Using black icing with tip 3, pipe outlines of dinosaur, as well as black outline over light green outline on nostril. Outline pupil of eye. Using zig-zag technique, fill in. Pat smooth with finger dipped in cornstarch.

Fill in cake. Prepare decorating bag with tip 18 and light sage green icing. Fill in remaining parts of dinosaur using star fill in technique.

Add border. Position black candy-coated chocolate candies around bottom border of cake.