Cream together butter and sugars until smooth and creamy
Add molasses, egg and vanilla and beat until smooth
Add baking soda and salt to flour
Add dry ingredients to wet ingredients, ½ cup at a time, until almost combined
Fold in chocolate chips
Separate dough in half
Form each half into logs about 2½ inch thick
Wrap in plastic wrap and refrigerate for minimum 12 hours and up to 3 days
When ready to bake, preheat oven to 350°F and line baking sheet with parchment paper
Remove cookie log from fridge and slice dough into ¼" thick round slices
Place slices on baking sheet
Bake in preheated oven for 9-11 minutes
Allow to cool on baking sheet for 3 minutes before moving to cooling rack
Serve warm or allow to cool completely before serving.