01 -
Get your oven hot at 180oC (356oF) and line a 9-inch square tin with parchment paper.
02 -
Mix sugar and eggs in a bowl until well combined.
03 -
Pour your cooled melted butter into the egg mixture, stirring as you go.
04 -
Stir in the flour until you get a thick, smooth batter.
05 -
Fold in the white chocolate chips until they're evenly spread throughout.
06 -
Pour into your tin, smooth the top, add a sprinkle of sea salt if you like, and bake for about 25 minutes until golden and slightly crackled.
07 -
Let them cool completely in the tin, then lift out and cut into squares.