In a bowl, combine softened butter and powdered sugar until thoroughly mixed together.
Add egg yolk, vanilla extract, ONE tablespoon of rosé reduction and mix to combine.
Using a spatula, fold in the flour, cornstarch, black pepper, and powdered freeze dried strawberries. The mixture will look dry at first but will turn into a soft dough.
Place the dough into a gallon sealable bag and press the dough flat, filling the entire surface area of the bag with the dough.
Chill for at least 2 hours. The longer the better. The dough can be kept in the fridge for up to 2 days.
After the dough has chilled, cut the gallon storage bag open and place the flat square of dough onto a lightly floured work surface.
Roll the dough to even out the edges, the dough should be about a ¼ inch thick. No thicker than a ½ inch.
Using a fluted 2½ inch cookie cutter, cut out circle shapes from the dough.
Carefully place the circles on a parchment lined baking sheet spacing 2 inches apart. I fit 12 circles on a baking sheet.
Bake at 350*F for 10-12 minutes. The cookies will look dry to the touch but won't have very much color on them.
Reroll the dough and repeat cutting out circles until all the dough is used. Bake one baking sheet of cookies at a time.
Allow the cookies to cool on the pan for 10 minutes then transfer to a wire rack to finish cooling.