In a large bowl, beat melted butter, 1-1/2 cups brown sugar and salt until fluffy. Add eggs and vanilla. Beat until well combined. Stir in flour and baking soda. Continue stirring until flour is incorporated. Fold in chocolate chips.
Scoop balls of dough, 1-inch round. Roll in reserved brown sugar. Place on baking sheet at least 2 inches apart. Press down dough to flatten.
Bake on center rack of oven until puffed and edges are golden, 10 - 12 minutes.
Allow to cool on pan for 5 minutes, then transfer to a cooling rack to cool completely.
Store in airtight container, at room temperature for up to 3 days. Freeze for up to 3 months.