In a medium saucepan, combine 1/2 cup of unsalted butter and 1 cup of semi-sweet chocolate chips over low heat. Stir continuously until melted, about 5 minutes.

In a large mixing bowl, add 1 cup of granulated sugar to the cooled chocolate mixture and whisk until well combined. Then, crack in 2 large eggs one at a time, ensuring each is fully incorporated. Finish by whisking in 1 teaspoon of vanilla extract until glossy.

In another bowl, whisk together 1 cup of all-purpose flour, 1/3 cup of unsweetened cocoa powder, and 1/4 teaspoon of salt until evenly mixed.

Gradually add the dry ingredients to the wet mixture, folding gently until just combined; the batter should be thick and fudgy.

Pour the brownie batter into a greased 9x9-inch baking dish, spreading evenly. Preheat oven to 350°F (175°C) and bake for 20-25 minutes until a toothpick comes out with a few moist crumbs.

Let the brownies cool in the pan for about 15-20 minutes. Once cool, frost with chocolate frosting and use chocolate chips and candies to create Chewbacca's features.