Originally Posted by grumblebee
Rice krispie treats made with lactose free margarine instead of butter would fit the criteria. The standard, easy recipe is basically just marshmallows, rice krispie cereal, a bit of margarine and some vanilla extract.
Actually Rice Krispies are not gluten free. They are wheat free, but they contain malt flavoring which contains gluten. For someone on a gluten free diet this could make them sick.
For the OP who mentioned using a mix, there is a brand called Cherrybrook Farms (I cannot post links, but you can google them) that makes gluten free/casein free/peanut free cake, cookie and pancake mixes. I have found them in several small local health food stores, Whole Foods, Earth Fare, and even my local Kroger.