Line a baking sheet with parchment paper.

Melt the dark chocolate in a microwave-safe bowl in 30-second intervals, stirring in between, until smooth. Alternatively, melt using a double boiler.

Stir in the peppermint extract and coconut oil (if using).

Pour the melted dark chocolate onto the prepared baking sheet, spreading it evenly with a spatula.

Melt the white chocolate in the same way and drizzle it over the dark chocolate layer.

Use a toothpick or skewer to swirl the two chocolates together for a marbled effect.

Sprinkle the crushed peppermint candies evenly over the top.

Refrigerate for about 30 minutes or until fully set.

Break into pieces and enjoy!