Vanillekipferl

Stir together all-purpose flour, almond flour, and 1/2 cup plus 2 tablespoons sugar in a large bowl. Add butter and egg yolks; knead by hand until a smooth dough forms.

Divide dough into quarters and form each piece into a rectangle. Wrap each rectangle in plastic wrap. Chill dough in the refrigerator until firm, at least 1 hour, and up to overnight.

Make vanilla sugar: Place 1/2 cup plus 1 tablespoon white sugar in a food processor. Cut each vanilla bean in half lengthwise and scrape seeds from each half with the back of the knife; add to sugar. Pulse until seeds are evenly dispersed. Pour vanilla sugar into a shallow bowl and set aside.

Preheat the oven to 350 degrees F (175 degrees C). Line 2 large baking sheets with parchment paper.

Cut 1 portion of dough into 6 equal pieces, keeping remaining dough chilled. Roll each piece evenly into a 1/2-inch-thick log on a lightly floured surface. Cut each log crosswise into 2-inch pieces and gently roll or pinch ends of each piece into points. Arrange cookies on the prepared baking sheets.

Bake in the preheated oven until bottoms are lightly golden but tops are still pale, 10 to 12 minutes. Remove from the oven and let stand for 2 minutes.

Roll warm cookies in vanilla sugar, brushing off excess sugar. Transfer cookies to a wire rack to cool completely. Repeat with remaining dough, baking in batches.