Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper.

In a large bowl, cream together the softened butter and granulated sugar until light and fluffy, about 3 minutes.

Beat in the egg and vanilla extract until well combined.

In a separate bowl, whisk the flour and baking powder together. Gradually add to the wet ingredients, mixing gently until just combined.

Scoop tablespoon-sized portions of dough onto the prepared baking sheets, spacing them apart.

Bake for 8-10 minutes or until lightly golden around the edges. Allow to cool slightly before decorating with sprinkles.