Preheat the oven to 350 degrees F. Line a 9-inch by 9-inch baking pan with parchment paper.
Mix all the dry ingredients in a bowl, i.e., flour, baking powder, and salt. Keep this aside.
2 ½ cups All purpose flour (300g), 1 teaspoon Baking powder, 1 teaspoon Salt
Add melted butter, brown sugar, sugar, eggs, and vanilla extract in another bowl and whisk until light and fluffy.
1 cup Melted butter (200g), 1 cup Brown sugar (200g), ½ cup White sugar (100g), 2 Eggs, 2 teaspoon Vanilla extract
To this, add the dry ingredients and mix until combined. Check out the video here. Fold in white chocolate chips. Of course, adding white chocolate chips is entirely optional/
¾ cup White chocolate chips or chunks
Spread this into a prepared baking pan and top with more white chocolate chips if needed.
Bake for 25 to 30 minutes or until a toothpick inserted comes out clean.
Let it cool completely, cut it into pieces of the desired size and enjoy.