100g butter, 60g almond flour, 1 egg, stevia (about 60g), 4-5 drops vanilla extract
Preheat the oven to 170°C (338°F).
In a bowl, mix melted butter and sweetener.
Add the egg and vanilla extract, and mix well.
Sift in cake flour, matcha powder, and salt, then combine with a spatula.
Line a baking pan with parchment paper and spread the batter evenly.
Bake at 170°C (338°F) for 20-25 minutes.
Let it cool completely and cut into bite-size pieces.