In a large mixing bowl, cream the softened 1 cup unsalted butter ¾ cup brown sugar and ¾ cups white sugar until light and fluffy.
Stir in the 2 large eggs and 1 1/2 teaspoons vanilla extract, mixing until just combined.
In a medium mixing bowl, sift together the 2 ¼ cup flour and 1 teaspoon baking soda and then add to wet ingredients until just mixed.
By hand, fold in 1 cup of the crushed wavy potato chips and 1 ½ cups chocolate chips.
Place the remaining potato chips into a shallow bowl. Roll the dough into 1 tablespoon balls and then in the crushed potato chips. You might need to pack them in to get them to stick.
Place on a parchment lined baking sheet.
Bake for 15-17 minutes or until lightly browned just around the edges.
While still hot and tacky, sprinkle with the Fleur de sel.
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