1. Line a baking sheet with parchment paper or a silicone mat.

2. Melt the dark chocolate: Place chopped dark chocolate in a microwave-safe bowl. Microwave in 30-second intervals, stirring after each, until smooth and melted. Be careful not to scorch it.

3. Pour the melted dark chocolate onto the prepared baking sheet. Using an offset spatula or the back of a spoon, spread it evenly into a thin layer (about 1/8 to 1/4 inch thick).

4. Melt the white chocolate: In a separate microwave-safe bowl, melt the white chocolate using the same method. If desired, stir in a few drops of peppermint extract for a festive touch.

5. Drizzle the white chocolate over the melted dark chocolate in parallel lines, about 1 inch apart.

6. Create the webbed pattern: Take a toothpick or a skewer and drag it perpendicularly through the white chocolate lines. Drag it in one direction, then drag it back the opposite way between the previous lines to create the elegant web design. Repeat until the entire surface has a webbed chocolate bark pattern.

7. Add toppings (optional): Immediately sprinkle with your desired toppings if using.

8. Chill and set: Place the baking sheet in the refrigerator for at least 30-60 minutes, or until the chocolate is completely set and firm.

9. Break into pieces: Once firm, break the webbed chocolate bark into irregular pieces. Store in an airtight container at room temperature or in the refrigerator for up to 2 weeks.