Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.

In a microwave-safe bowl, melt ½ cup of unsalted butter with 1 cup of semi-sweet chocolate until smooth.

Beat together 2 large eggs, ½ cup of granulated sugar, and ½ cup of light brown sugar for about 2-3 minutes until thick and pale.

Mix in the melted butter and chocolate, along with 1 teaspoon of vanilla extract until fully incorporated.

Whisk together ½ cup of all-purpose flour, ¼ cup of unsweetened cocoa powder, ½ teaspoon of baking powder, and ¼ teaspoon of salt in a separate bowl.

Carefully combine the dry ingredients into the wet mixture until just combined.

Fold in ½ cup of chocolate chips or chunks.

Allow the dough to rest for 10-15 minutes at room temperature.

Drop rounds of dough onto the lined baking sheet and bake for about 10-12 minutes.

Cool on the baking sheet for at least 5 minutes before transferring to a wire rack.