Birthday Cake Cookies

Prep: Preheat oven to 350°F. Line a baking sheet with parchment paper and set aside.
Dry mixture: In a small bowl, stir together flour, baking powder, baking soda, and salt. Set aside.
Wet mixture: In a large mixing bowl, use a hand mixer or whisk to mix melted butter and sugar until combined. Add the egg and clear vanilla extract and whisk until incorporated.
Combine dry and wet mixture: Add the flour mixture and mix until almost combined. Add the white chocolate and rainbow sprinkles. Switch to a spatula to finish folding the dough together to prevent overmixing.
Scoop cookie dough: Use a cookie scooper to scoop the cookie dough. Release the dough ball onto your lined baking sheet, leaving about 2" in between each cookie for spreading.
Bake: Bake for about 11-12 minutes or until the edges are set but the middles of the cookies are still very soft. In the last 2 minutes of baking, press a few extra chunks of chocolate on top of each cookie and sprinkle with more sprinkles.
Let cool: Immediately after taking them out of the oven, swirl the cookies around with a round cookie cutter that's slightly larger than the cookies to push the uneven edges in for perfectly round cookies (optional). Let the cookies cool on the baking sheet for about 10 minutes until they're firm enough to handle before transferring them to a wire rack to cool.