Preheat oven to 350°.
Stir baking soda, flour and salt; set aside.
Combine butter, sugars and pudding mix, beating until fluffy.
Add vanilla and egg; beat until smooth.
Add dry ingredients; mix well.
Stir in chocolate chips.
Roll dough into balls and bake for 8-10 minutes.
Remove cookies from oven, place on a wire rack to cool
Before cookies cool, stuff a Rolo in the middle of the cookie.
While the Rolo is still warm, gently add holly sprinkles to the top of the candy.