Combine first 4 ingredients and cinnamon, if desired, in a heavy saucepan. Cook over medium heat, stirring until morsels and butter melt. Place cereal and crackers in a large bowl; add melted white chocolate mixture. Stir until well coated. Let cool slightly.
Place powdered sugar in a large zip-top plastic bag. Add coated cereal mixture in batches; seal bag, and toss well to coat. Combine sugar-coated cereal mixture, almonds, and remaining ingredients in a large bowl. Stir gently to blend. Store in an airtight container.