INGREDIENTS
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100 grams (7 tablespoons) good-quality butter, softened (I use semi-salted butter; if you use unsalted, add 1/4 teaspoon sea salt)
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50 grams (6 tablespoons) confectioner's sugar
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1 egg yolk (see note)
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90 grams (3/4 cup) flour
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40 grams (6 tablespoons) finely ground almonds (a.k.a. almond meal or poudre d'amande; look for it at natural food stores)
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2 teaspoons matcha (green tea powder)
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2 tablespoons sugar, preferably an unrefined cane sugar in coarse crystals, such as turbinado or demerara