Hey! I just moved to USA to california... The US grocery stores are so much different. Which products and what are they called are the best for gunging would you say??
I also looove chocolate syrup, Nutella, honey, peanut butter, chocolate cream pies, cake icing and cheesecake. And I have been known to mix all of the above in a single filthy sweet session.
You can find most of this in the baking aisle and ready-made pastries and pies in the bakery (usually near the front of the store with bread in American grocery stores).
Welcome to the US and hope your messy dreams come true here! I hear California is great for mud, too.
Welcome to the USA! As others have noted, you'll find all kinds of good foods to use for your messy sessions in the average supermarket. In addition to those already named, you might also find large cans of queso and/or nacho cheese sauce. Make sure to get the non-spicy kind - the jalapeno flavoring can burn a bit. Check around the supermarkets to see who sells day-old bakery goods - that can be a good way to pick up an inexpensive fresh pie.