1 cup Vanilla frosting
1/4 cup Rainbow sprinkles (plus more for sprinkling)
2 cups Chocolate chips (plus more for sprinkling)
1/2 tsp. Kosher salt
1 tsp. Baking soda
2 2/3 cups All-purpose flour
2 tsp. Pure vanilla extract
2 Large eggs
3/4 cup Granulated sugar
3/4 cup Packed brown sugar
1 cup Butter, softened