In a large bowl, whisk melted butter, egg, egg yolk, and vanilla extract. Add the contents of the jar and gently stir with a wooden spoon or rubber spatula until combined. Place in the refrigerator for 30 minutes.
Scoop 2-tablespoon portions of dough. Place the dough balls onto parchment lined baking sheets and bake at 350°F for 9-11 minutes, until the edges are set and the centers of the cookies are slightly underdone. Place baking sheets on racks and cool completely. Tip: For prettier cookies, use the back of a spoon to shape the edges of the cookies when they come out of the oven.