01 -
In a small saucepan over medium heat, cook the blueberries for 5 to 7 minutes, stirring frequently, until the berries burst and become thick and jammy. Remove from heat and allow to cool slightly before blending or mashing until smooth. Measure out 1/2 cup of the puree.
02 -
In a large mixing bowl, beat the softened unsalted butter, granulated sugar, and brown sugar together for 2 to 3 minutes until the mixture is light and fluffy.
03 -
Beat in the egg, vanilla extract, and cooled blueberry puree until well combined. The mixture may appear separated but will come together with the dry ingredients.
04 -
In a separate bowl, whisk together the all-purpose flour, baking powder, and salt. Gradually add the dry mixture to the wet ingredients, stirring until just fully incorporated. The dough should be soft and slightly sticky.
05 -
Cover the bowl tightly and refrigerate the dough for at least 1 hour to allow the dough to firm up and the flavors to meld.
06 -
Preheat oven to 350°F. Scoop about 1 1/2 tablespoons of dough and shape into balls. Roll each dough ball generously in powdered sugar to coat completely on all sides.
07 -
Arrange the coated dough balls on a parchment-lined baking sheet, leaving 2 inches of space between each. Bake for 10 to 12 minutes, until the tops are crinkled and the centers appear set but still soft.
08 -
Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely. Serve warm or at room temperature.