In a medium saucepan over low heat, melt ½ cup of unsalted butter and 1 cup of semi-sweet chocolate chips, stirring continuously until smooth and glossy. This should take about 5 minutes; be careful not to overheat. Remove from heat and let cool slightly.

In a large mixing bowl, combine 1 cup of granulated sugar with the cooled chocolate mixture. Whisk until blended. Add 2 large eggs one at a time, whisk vigorously to incorporate air, and mix in 1 teaspoon of vanilla extract.

In a separate bowl, sift together 1 cup of all-purpose flour, ⅓ cup of unsweetened cocoa powder, and ¼ teaspoon of salt. Gradually fold the dry mixture into the wet ingredients using a spatula, ensuring not to overmix.

Preheat your oven to 350°F (175°C) and grease an 8x8-inch baking pan. Pour the brownie batter evenly within and bake for 20-25 minutes. A toothpick inserted into the center should come out with a few moist crumbs.

Once baked, cool the brownies in the pan for about 15 minutes, then transfer to a wire rack to cool completely. Spread chocolate frosting on top and decorate with chocolate chips and candies to create Chewbacca's features.