Preheat oven to 350 degrees F. Line cookie sheets with parchment paper or baking mat.
In a large bowl, add butter, granulated sugar, brown sugar, and cream together. Add egg, egg yolk, vanilla extract mixing until everything is well combined.
In another bowl, whisk together, flour, cocoa powder, salt, baking soda, and baking powder.
Slowly add the dry ingredients into the wet ingredients using hand held mixer. Eventually, use hands if needed. Mix in mint chips, chocolate chips, and chocolate chunks.
Bake for 10-12 minutes.