This recipe for flavorful matcha financiers involves browning unsalted butter, mixing it with egg whites, sugar, and salt, then adding almond flour, rice flour (or cake flour), baking powder, and matcha powder. Finally, browning the butter and pouring the batter into a mold, then baking it in the oven. The result is a moist texture and fragrant matcha financier, perfect for enjoying at home or as a gift.