Preheat oven to 350 degrees and line three baking sheets with parchment paper.
In a medium size bowl, cream butter and sugar together with an electric mixer on medium speed for 2 minutes, until light and fluffy.
Beat in egg and vanilla extract and mix for an additional minute.
Add the flour, baking soda, and salt to the bowl and mix until just combined.
Using a 3 TBS cookie scoop, scoop dough and gently roll the tops of each cooke in sprinkles and coat generously. Place sprinkled cookies on lined baking sheets, 2 inches apart to allow for some spreading.
Bake for 10 minutes, rotating the pan halfway through to ensure even baking.
Let cookies cool on the cookie sheet for 5 minutes before transferring to a wire rack to cool completely.
Store cookies in airtight container for 3-5 days or freeze for up to 3 months.