We only wanted a sandwich, we all opted for bacon sandwiches, and they explained they had measures in places to prevent cross contamination and the lady knew what was and wasn't gluten free except for the hot chocolate. I always throw a spanner in the works when I ask if hot chocolate is gluten free, I don't know why but some places just don't think to check hot chocolate, however it wasn't a problem, she happily went and checked and even checked if all the flake and marshmallows were ok (they all were).
We couldn't resist the cakes on the display so just had to get some for later one, thankfully you can get them to take out as well as eat in, such a huge selection including cheesecakes! We had a few different ones between us, elderberry, a brownie and victoria sponge, we thought we'd save the cheesecake for another day! I tried a bit of all of them and they were all lovely and soft, I'm sure anyone not gluten free wouldn't be able to tell the difference.
Marmalade is definitely worth a visit if you are in Chester, the food is good and pretty good priced, fab staff and have an array of gluten free foods on offer, even if you just go for cake and a brew you should give it a try.