Step 1
Use 2 1/2 cups chocolate buttercream icing. Tint black and use for all decorating.
Step 2
For eyes, inside of helmet, nose opening and inner chin area, pipe in with tip 3. Pat smooth with finger dipped in cornstarch
Step 3
For outlines on inner chin area, pipe outlines with tip 2.
Step 4
For outlines on helmet areas, eyes and face areas (except mouth), pipe outlines with tip 3.
Step 5
For outlines inside mouth and around mouth, pipe outlines with tip 5.
Step 6
For zigzags in inner chin area, pipe zigzags with tip 1.
Step 7
For remaining areas of cake, pipe stars with tip 16.
Step 8
For bolts at end of cheek lines, pipe dots with tip 5.