In a large bowl, melt 10 tablespoons of the butter in the microwave. Take care not to overheat; microwave the butter until just melted. Stir in the remaining 4 tablespoons butter until melted. Allow the butter to cool for 5-10 minutes (it should be about 90-95 degrees on an instant read thermometer).
Roll the dough into balls, about 2 tablespoons for each cookie. Roll the balls in the granulated sugar and place on lightly greased or lined (with parchment or silpat liners) baking sheets. Using the bottom of a glass, flatten the cookies to about 1/4-inch thick, more or less. Sprinkle the cookies with a bit more granulated sugar (just a pinch per cookie).
Bake the cookies, one sheet at a time, until they have puffed and have cracks running through the top, about 12-14 minutes. Don't overbake or the cookies will be dry. Transfer the cookies to a baking rack to cool completely.