Whisk together flour, salt, and baking soda in a medium bowl.
Pour the melted butter into a large bowl. Add the two sugars. Beat the butter and sugars together with an electric beater or whisk. Add the egg, yolk, milk, and vanilla and beat until combined. Slowly add the flour mixture until combined. Stir in chocolate chips or chunks
Chill the dough for 30 minutes or overnight.
Heat oven to 375 degrees. Grease the ramekins with butter or cooking spray. This recipe will make about 6 standard ramekins, but you can also just make a few at a time if you prefer.
Scoop 1/2 cup portions of dough into the greased ramekins. Place on a baking sheet and bake for 18-21 minutes or until outsides are golden and set and insides are still a bit puffy and soft. (That's just my preference...you can bake longer if you want them set all the way
Remove from oven. Top with vanilla ice cream and chocolate syrup. Serve warm.
Note: Leftover dough can be scooped into 2 Tablespoon round portions and frozen for future cookies. :)