1Preheat oven to 300 degrees. Spray large baking sheet with nonstick cooking spray.
2Place sugar, syrup and butter in heavy small saucepan. Heat over medium heat until mixture boils and sugar dissolves, stirring often. Remove from heat; stir in vanilla.
3Combined pretzels,cereal and cashews in large bowl. Pour sugar mixture over pretzel mixture; toss to coat evenly. Spread on prepared baking sheet. Bake 30 minutes, stirring after 15 mins. Spread onto greased waxed paper. Cool completely; break into clusters.