Melt the butter until slight brown, let it cool.

In a large bowl, mix icing sugar, flour, almond flour and chopped pistachio together.

Beat the egg whites with a fork (do not need to make foam, just separate the egg whites) , add into dry ingredients. Mix until half way.

Then add in melted butter, mix until well combined.

Butter the tin very well, then pour the batter into a tin. Sprinkle more pistachio on top.

Pop in preheated oven at 200C, bake for about 10-12mins. Let them cool in a pan for few minutes before taking them out. Enjoy!