1. Preheat your oven to 350°F (175°C).
2. In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until smooth.
3. Add the egg and vanilla extract, mixing until well combined.
4. In another bowl, combine the rolled oats, flour, baking soda, and salt.
5. Gradually add the dry ingredients to the wet mixture, stirring until just combined.
6. Fold in the chocolate chips and sprinkles.
7. Drop spoonfuls of dough onto a baking sheet lined with parchment paper.
8. Bake for 10-12 minutes or until the edges are golden brown.
9. Let cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.

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