Getting chocolates in Lucerne, Grindelwald, Zurich

I'm a fan of chocolate. Will be spending my time in Lucerne and Grindelwald mostly and a day in Zurich. I'm looking for places to buy chocolates at a reasonable price. Any recommendations for shops??

Thanks

We saw in February 2016 Easter eggs in Grindelwald, 10 small eggs for Euro 19.00

There is a great chocolate shop in the main street, but very, very expensive.

(Like everything in Switzerland.........)

I have the same question for my travel on 18/4/2016.... But I would say you can check the super market stores -- COOP or the like.

Yes, for a reasonable price is the supermarket the only place.........