01 - Preheat oven to 350°F. Line baking sheets with parchment paper to prevent sticking.
02 - In a large mixing bowl, beat softened butter and granulated sugar together until the mixture appears pale and fluffy, approximately 2-3 minutes.
03 - Add the egg and vanilla extract to the butter mixture. Continue mixing until fully combined and smooth.
04 - In a separate bowl, whisk together all-purpose flour, salt, and baking powder until evenly distributed.
05 - Gradually add the dry ingredients to the wet mixture, mixing on low speed just until the flour disappears. Avoid overmixing to prevent tough cookies.
06 - Scoop approximately one tablespoon of dough per cookie and roll between palms to form smooth balls. Roll each ball generously in pastel sprinkles or colored sanding sugar to coat evenly.
07 - Place coated dough balls 2 inches apart on prepared baking sheets to allow for spreading during baking.
08 - Bake for 8 to 10 minutes until edges appear set but centers remain slightly soft. Avoid overbaking for optimal texture.
09 - Remove cookies from oven and immediately press one chocolate blossom candy into the center of each warm cookie. The candy will soften slightly to adhere.
10 - Allow cookies to rest on baking sheets for 5 minutes to set. Transfer to a wire rack and cool completely before serving or storing.