01 -
Preheat your oven to 350°F (175°C) and line your baking sheets with parchment paper.
02 -
In a large mixing bowl, cream together the softened butter and granulated sugar until the mixture is light and fluffy. Add the egg and vanilla extract, beating until fully incorporated.
03 -
In a separate bowl, whisk together the flour, baking powder, and salt. Gradually blend this into the butter mixture until everything is just combined.
04 -
Gently fold in the rainbow sprinkles and white chocolate chips.
05 -
Scoop out tablespoon-sized portions of dough, roll them into balls, and coat them in additional rainbow sprinkles. Place them on the prepared baking sheets, leaving about 2 inches of space between each one.
06 -
Pop the cookies into the oven and bake for 10-12 minutes, or until the edges start to turn a light golden brown. Once baked, let the cookies cool on the baking sheets for 5 minutes before transferring them to a wire rack to cool completely.
07 -
For an extra magical touch, sprinkle edible glitter over the cooled cookies.