Confectioners sugar, or powdered sugar, is the ideal choice for cookies requiring increased spread using the spread method due to its fine texture and rapid dissolution, which promotes greater dough expansion.
- Fine sugar, being slightly coarser, results in less spread.
- Cube sugar is compressed into blocks and is unsuitable for cookie spread.
- Granulated sugar, while standard, offers less spread enhancement compared to confectioners sugar.
Therefore, confectioners sugar is the appropriate selection.