Melt white chocolate chips with 1 tablespoon coconut oil in a microwave-safe bowl, stirring every 30 seconds until smooth. Repeat with milk chocolate chips and remaining coconut oil in a separate bowl.
Dip each Oreo fully into your chosen chocolate using a fork, letting excess drip off.
Place on a parchment-lined baking sheet and immediately add sprinkles or candy cane dust.
Repeat with remaining cookies, alternating between white and milk chocolate for variety.
Let set at room temperature for 30 minutes or refrigerate for 15 minutes until firm.