Begin by gathering all your ingredients: Rice Chex cereal, white chocolate, lemon zest, powdered sugar, and lemon juice. Have a large mixing bowl, a microwave-safe dish, and a baking sheet ready.

In your microwave-safe dish, combine the white chocolate, lemon zest, and lemon juice. Heat the mixture in the microwave for about 30 seconds, stirring halfway through, until it's smoothly melted and glossy.

In the large mixing bowl, pour the melted chocolate mixture over the Rice Chex cereal. Toss the cereal gently to coat it evenly.

While the cereal is still warm, sprinkle powdered sugar over the mixture gradually. Toss gently, ensuring every piece is coated.

Spread the coated cereal mixture on a baking sheet lined with parchment paper. Allow your snack to cool completely before serving.