Melt the unsalted butter and cook until it turns slightly brown to make brown butter.
In a bowl, mix almond flour, cake flour, sugar, and salt evenly.
Add the egg whites and gently combine.
Slowly pour in the brown butter while mixing thoroughly.
Add 1/2 tablespoon of J'adore (raspberry jam) to the batter and swirl to create a marbling effect.
Fill the financier molds about 80% with the batter.
Bake in a preheated oven at 180°C for 12-15 minutes.
Remove from molds after completely cooling.