Hazelnut Cake

Ingredients

• 115 g (1 stick or 1/2 cup) brown butter, melted
• 200 g (2 cups) ground hazelnuts
• 200 g (1 cup) powdered sugar, sifted
• 125 g (1 cup) all-purpose flour
• 1 teaspoon baking soda
• 1 pinch salt
• 250 g (1 cup) egg whites, about 8 eggs
• 1 teaspoon vanilla extract
• butter for greasing, about 30g (2 tablespoons)
• 1 Bundt pan - 2.4L (10 cups), 25cm diameter