Hmmmmm... Thyme is pretty potent stuff. I would blend some fresh thyme with enough hot cream to create a vortex, then run it through cheesecloth. The resulting 'extract,' when chilled, may have enough potencey to create thyme flavored ice cream with as little as a teaspoon to a gallon of ice cream. That little added to ice cream shouldn't change it's chemistry that much.
Unfreezing the ice cream to add the teaspoon of liquid and then refreezing could give you problems, though. I would probably soften up the ice enough to add the extract and then serve it in a softened state rather than trying to refreeze it. |