Begin by finding a large mixing bowl for tossing the cereal and chocolate mixture.

In a microwave-safe bowl, combine the white chocolate chips and butter. Heat in the microwave in 30-second intervals, stirring well until melted and smooth.

Stir in the lemonade mix and vanilla extract into the melted mixture until creamy.

Pour the Chex cereal into the melted white chocolate mixture and gently fold until coated.

In a separate container, combine powdered sugar and lemon zest (if using). Transfer the coated Chex cereal into the container and shake to coat.

Spread the mixture on a baking sheet or parchment paper to cool, then serve or store in airtight containers.