01 -
Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
02 -
In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.
03 -
Beat in the egg and vanilla extract until well combined.
04 -
In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
05 -
Scoop small portions of dough and flatten them into discs. Place a teaspoon of blueberry jam in the center of each disc and fold the dough over, sealing the edges.
06 -
Place the filled cookies on the prepared baking sheet and bake for 12-15 minutes, or until the edges are lightly golden. Cool completely on a wire rack.
07 -
In a small bowl, whisk together the powdered sugar and lemon juice to make the lemon frosting.
08 -
Drizzle the lemon frosting over the cooled cookies and sprinkle with blue sugar crystals for garnish.