Place the butter in a saucepan and place over medium heat. Cook until the butter is melted and it starts to look golden brown. Be careful as it burns easily. This is beurre noisette. Place aside.

In a bowl, mix the almond flour, lemon zest, sugar and flour. Add a pinch of salt.

Stir in the egg whites and butter and mix just until combined.

Spoon the batter into small muffin cups (silicone muffin cups in my case) and top each friand with a few berries.

Bake in the preheated oven at 200F for 5 minutes then reduce to 180C and bake for another 15-20 minutes or until golden brown and crusty.

Allow to cool for a few minutes in the cups then remove on a platter.