Prepare your baking sheet: Line a baking sheet with parchment paper or a silicone mat to prevent sticking.
Melt the chocolate: In a microwave-safe bowl, melt the chocolate chips in 30-second intervals, stirring in between until smooth.
Spread the chocolate: Pour the melted chocolate onto the prepared baking sheet and spread it evenly with a spatula to your desired thickness.
Add toppings: While the chocolate is still warm, sprinkle the candy corn, mini marshmallows, pretzel pieces, crushed Oreo cookies, and sprinkles evenly over the chocolate.
Chill the bark: Place the baking sheet in the refrigerator for about 5-10 minutes, or until the chocolate hardens.
Break into pieces: Once the chocolate has set, break the bark into pieces and enjoy!