Tiered Round Cake

Start from the top by removing the 6-inch tier, which is usually saved for the bride and groom to keep.
Cut a circle about 2 inches from the outer edge of the 10-inch tier.
Work from this circle and make vertical cuts about 1-inch apart until the ring is completely sliced.
Use the same starting procedure and cut another 2-inch ring, again slicing into 1-inch pieces.
Repeat the procedure until the whole tier is cut.
Then repeat entire process on the remaining tiers until all the cake has been served.

Tiered Square Cake

Start from the top by removing the 6-inch tier, which is usually saved for the bride and groom to keep.
Work from any side to cut a horizontal line about 2 inches from the outer edge of the tier.
Slice from right to left to make vertical cuts about 1-inch apart until the entire row has been sliced.
Cut another horizontal line 2 inches from the new edge, and slice this row.
Repeat until the entire tier has been cut.
You should produce five rows in the 10-inch tier.
Move to the next tier and repeat the process for seven rows.