Preheat your oven to 180 degrees Celsius (350 degrees Fahrenheit). Prepare a baking tray with parchment paper or lightly grease it.
In a large bowl, mix the melted butter with the white sugar and brown light
sugar until well combined.
Add the egg and vanilla extract to the butter and sugar mixture. Continue
mixing until incorporated.
In another bowl, sift together the flour, salt, and baking powder.
Gradually add the sifted dry ingredients to the butter and sugar mixture.
Mix with a spatula until all ingredients are combined and no flour clumps
remain.
Add the chocolate chips and chocolate chunks to the dough and mix until
evenly distributed.
Cover the bowl with plastic wrap and refrigerate the dough for at least 1 to
2 hours, or until firm enough to form into balls.
Once the dough is chilled, form tablespoon-sized balls and place them on
the prepared baking tray, leaving space between each cookie for spreading
during baking.
Bake the cookies in the preheated oven for approximately 10 minutes, or until the edges are lightly golden.
Remove the cookies from the oven and let them cool on the tray for a few minutes before transferring them to a wire rack to cool completely.
Once the cookies are completely cool, enjoy them with a glass of milk or your favorite beverage.