We used to live in Roanoke, VA and ate at Pizza Inn frequently. I'm not sure why, but I always thought their chocolate pizza was just canned chocolate pudding spread on pizza crust and heated. That may be completely wrong. Maybe someone else knows for sure.
Here in OH., we have East of Chicago Pizza which makes a PB &J pizza. It is peanut butter spread on a pizza crust and topped with strawberry jelly. Then they bake it until it is hot through and the jelly melts. It's yummy