Step 2) Combine sugar, corn syrup and butter in saucepan over medium-high heat. Stirring frequently, bring to boil and cook for 1 minute. Remove from heat and add vanilla and food colorings (mixture will bubble). Drizzle glaze over snack mix and toss to coat. Gently stir in marshmallows and candy; immediately spread on baking sheet that has been sprayed with cooking spray.