Baking in drinking glasses -- heat vs. logo paint, other issues I've made this chocolate Guinness cake (Nigella Lawson) before.  It's delicious and looks good.  But it would look even better baked in pint glasses (or half pint).  It's a moist, slow-baking cake so should be fairly forgiving on cooking time.What should I consider before doing the experiment?  Things I have thought of:


The glass breaking from heat.

Obviously this is a risk.  I believe it would be a small risk if I place the glasses on a cold, thick baking sheet so they warm gradually without thermal shock.  If anyone has tried this and proved me wrong, I'd like to know.
Paint on the glass.

Best of all would be to use a Guinness glass.  But what would happen to the painted logo in the oven?


What haven't I thought of?
What you want to do has been done successfully. There is a video and instructions here:

Guinness Cake baked in Guinness glasses

I believe the greatest risk of thermal shock would come when you remove the cakes from the oven. Do not take the glasses out of the baking pan and place on a cool counter top (doing this can break some heat safe glass).  Cool in the baking pan on a cooling rack or on a pot holder/towel.

As far as the painted logo on the glass, if it is commercailly produced, the logo would have been heat processed/baked on, so the heat in your oven should not be a problem.