Preheat the oven to 350 F. Line a 12-cup muffin pan with paper liners. In a medium bowl, whisk together flour, salt, and baking soda.
In a large bowl, combine butter with sugar until fluffy. Add in egg and vanilla extract, and mix until smooth. Add in the flour mixture, and mix until it is fully combined.
Fold in the chocolate chips. Evenly divide the cookie dough between the prepared muffin tins. Bake for 15-20 minutes. Remove from the oven, and top each cookie cup with one unwrapped Rolo.