Glucose powder is glucose in dry form. The name can cover two products: crystalline glucose, also known as dextrose, or glucose syrup that has been spray-dried into a powder, often called glucose syrup solids. Both are made from starch and are less sweet than table sugar.
A powder suits dry recipes such as wafer creams, where a liquid syrup would make the filling soft or sticky. Glucose powder adds body and bulk to a cream while keeping it less sweet than the same amount of sugar would.
The Lausanne wafer with chocolate and vanilla flavoured creams lists glucose powder (8%) separately from dextrose monohydrate (8%), which suggests that here the glucose powder is the dried-syrup type. The neighbouring pages for glucose and glucose syrup cover the related forms.
