I bet they all contain cornstarch which is not allowed on Phase I. I can't find the ingredients via Google. Perhaps you could post them.
You CAN have SF Jellos. I sometimes make them by dissolving the powder in 1/2 cup of hot water and then adding a cup and a half of milk of yogurt. They taste very "pudd" .
I don't think tapioca is allowed. I'm pretty sure it is a starch but I can't find my GFGC book right now. My box of tapioca (I used to use it in crockpot recipes) says it is 100% tapioca. Nothing else is listed on the ingredients. I know there is a reason that I haven't been using it since I started on SB.
The pudding does have starches which aren't allowed in phase 1 but you can have them in phase 2. I prefer to make my own so that I can use skim milk. I have yet to find the no sugar added pudding in a skim milk format.
Here is the info for the Pudding
Ingredients: WATER, XYLITOL, MODIFIED FOOD STARCH, COCOA PROCESSED WITH ALKALI, MILK PROTEIN CONCENTRATE, CONTAINS LESS THAN 1.5% OF HYDROGENATED VEGETABLE OIL (COCONUT AND PALM KERNEL OILS), SALT, SODIUM STEAROYL LACTYLATE (FOR SMOOTH TEXTURE), SODIUM ALGINATE, SUCRALOSE AND ACESULFAME POTASSIUM (SWEETENERS), NATURAL AND ARTIFICIAL FLAVOR, ARTIFICIAL COLOR.
Tapioca is basically a root starch derived from the cassava, or yuca plant. It's often used to thicken soups and sweeten the flavor of baked goods, and it makes a dandy pudding.
The cassava plant is native to South America and the West Indies, where its thick, fibrous roots are used in a variety of forms: bread flour, laundry starch, an alcoholic brew, and of course, tapioca pudding.