The Cake Halo and Sugar Sharp Edger could quite possibly be the most ingenious invention the cake decorating industry will see this year. These tools aim to help cake decorators perfect their ganaching technique and create flawless sharp edges on both round and square cakes.The Cake Halo and Sugar Sharp Edger could quite possibly be the most ingenious invention the cake decorating industry will see this year. These tools aim to help cake decorators perfect their ganaching technique and create flawless sharp edges on both round and square cakes.The Cake Halo and Sugar Sharp Edger could quite possibly be the most ingenious invention the cake decorating industry will see this year. These tools aim to help cake decorators perfect their ganaching technique and create flawless sharp edges on both round and square cakes.