Preheat the oven to 350°F (175°C).
Cream together 1 cup of softened unsalted butter, 1 cup of granulated sugar, and 1 cup of packed brown sugar until smooth.
Beat in 2 large eggs one at a time, then stir in 2 teaspoons of vanilla extract.
Whisk together 2 cups of all-purpose flour, 3/4 cup of unsweetened cocoa powder, 1 teaspoon of baking soda, and 1/2 teaspoon of salt in another bowl.
Gradually blend the dry ingredients into the wet mixture until fully combined.
Fold in 1 cup of semi-sweet chocolate chips gently until evenly distributed.
Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper, spacing them about two inches apart.
Bake in the preheated oven for 10-12 minutes, or until the edges are firm but the centers remain soft.
Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Once cooled, decorate with 1 cup of colorful chocolate eggs on top.