I made a quick stop at my local Stop & Shop this evening and found that they have the Ghirardelli Luxe Milk bars on sale for 2/$4, through 1/6. Here is how you can get them for $0.50:
Ghirardelli Luxe Milk Bars $2
Use $0.75/1 Ghirardelli Luxe Milk bar coupon
Pay $0.50 for one after doubled coupon
I also noticed they had Milky Way bars on sale $1 each and buy two get one free. You can get three for $1 like this
Buy three Milky Way bars $3
Use one$0.50/2 Mars chocolate coupon
Pay $1 for three after doubled coupon and buy two get one free sale
If you have access to two computers and can print three coupons then you could:
Buy six Milky Way bars $3
Use three $0.50/2 Mars chocolate coupon
Pay $1 for six after doubled coupon and buy two get one free sale
This sale runs through January 6th.