Add the butter and flour into a mixing bowl with paddle attachment and mix until coarse crumbs like bread crumb consistency. You can also use a food processor and pulse this the crumb is achieved.
Add the icing sugar, vanilla sugar, almond meal, salt and egg yolks and mix or pulse till the cookie dough comes together.
Remove the dough and divide into 4 equal parts and round into a ball shape.
Wrap with plastic and refrigerate for one hour or until cookie dough firms up.
Preheat the oven to 175°C ( 350°F).
Line a baking sheet with parchment paper.
Remove the chilled dough and roll into a 12 inch log.
Cut 12 equal parts and roll each piece into 3/4 inch crescents.
Place the shaped crescent onto baking sheet and separate 1/2 apart from each other.
Continuing following the same steps until cookie dough finished,
Place the baking pan into the oven and bake for 10-12 minutes or until the end on the crescent are light golden brown. .
Cool the Vanillekipferl Vanilla Crescent Cookies on baking tray for 3-4 minutes.
Place the topping mixture into a deep bowl, combine and toss each cookie into to it and coat.
Place the coated cookie onto a wire rack and let them cook them overnight to harden.
Repeat this process with the rest of the cookies.
Next day transfer cookies to air tight container or jar.
Cookies can be stored for up to 2 weeks.