In a large microwave-safe bowl, combine the light chocolate melting wafers and white chocolate melting wafers.
Microwave at 50% power, stirring every minute until fully melted and smooth.
Stir in the creamy peanut butter and vegetable oil until the mixture becomes silky and uniform.
Pour the mixture into silicone molds, mini muffin cups, or a parchment-lined baking dish.
Refrigerate for 20–25 minutes, or until firm.
Pop out of molds or cut into squares. Enjoy!