Beat together butter and both sugars.
Add egg and vanilla.
Add soda, powder and both flours until combined.
Fold in the bag of chips.
Chill dough 3-4 hours
Scoop large Tablespoon rounds onto a parchment lined sheet.
Bake at 350 10-12 minutes.
Immediately sprinkle with sea salt
Let cool a few minutes on sheet and remove to rack.