Prepare Dough: Cream butter and sugar until fluffy. Add egg yolk, vanilla, and almond extract.

Mix Dry Ingredients: In a separate bowl, combine flour, ground almonds, and salt. Gradually add to the wet mixture until a soft dough forms.

Chill Dough: Shape into a disc, wrap in plastic, and chill for 1 hour.

Shape Cookies: Preheat oven to 350°F (175°C). Roll dough into logs and form crescents, or roll into balls. Place on parchment-lined baking sheets.

Bake: Bake for 12–14 minutes until edges turn lightly golden. Keep tops pale. Cool on baking sheet for 2 minutes, then transfer to wire rack.

Dust with Sugar: While still warm, roll or sprinkle cookies with powdered sugar (with or without cinnamon). Let cool completely before serving.