How to Make It
Preheat oven to 275°F. Line a rimmed baking sheet with parchment paper; coat parchment with cooking spray.
Whisk together blue cheese, butter, milk powder, sugar, rosemary, and salt in a large bowl. Add crackers; toss gently to coat. Spread mixture evenly on prepared baking sheet. Bake in preheated oven until mixture is tacky but not moist, 25 to 30 minutes, stirring every 10 minutes.
Transfer baking sheet to a wire rack; cool completely, about 20 minutes. Transfer mixture to a bowl. Add cherries; toss to combine.