Mahleb Shortbread - recipe

6 T Salted butter
1 C Flour, sifted
2 tsp Mahleb (ground)
1/4 C Sugar
1 T vanilla
Confectioners' sugar

Melt the butter and cool until lukewarm. Mix the flour with the mahleb and sugar. Add the butter and vanilla and mix to a crumbly dough. Roll rounded teaspoons of the mixture into balls and place on baking sheets lined w/ parchment paper. Bake at 300 F for 30 minutes. Take out of the oven and let them stand about 30 seconds so they can firm up. While hot, roll in confectioners' sugar (be careful as they are still crumbly), and return to oven for 1 minute. Cool a few minutes on the sheets then transfer them to a wire rack with a spatula to finish cooling.