Possible Clues:

• Topping in cake is not gooey, initially
• If necessary, ____ sugar can be made from granulated sugar with a pestle and mortar
• Basic ingredients may include this in cake
• Top layer in old British firm no good
• NHL infraction that isn't called on the shorthanded team during a power play
• Topping work of butcher perhaps hasn't started
• Cupcake glaze
• What's topping individual cakes, including nice gateaux?
• Surface frost
• Cinnamon roll topper