Strip the meat from the rotisserie chicken and place it in a bowl, reserving any juices from the chicken packaging.
Bring a large pot of salted water to a rolling boil and add the pappardelle. Cook for 1 minute less than the package directions; reserve at least 2 cups of the pasta cooking water before draining.
While the pasta cooks, heat the butter and olive oil together in a small saucepan over medium heat until the butter melts.
Stir the chicken Better Than Bouillon (or crumble in 2 bouillon cubes) into the butter mixture and let it bubble gently to dissolve.
Add the chopped rosemary leaves and the 1/3 cup raisins to the saucepan, then pour in 1 cup of the reserved pasta water and reduce the heat to low so the mixture simmers gently.
Drain the pasta and add it directly to the saucepan with the butter-bouillon mixture. Stir in the shredded chicken and any reserved chicken juices, plus 1/2 cup of the reserved pasta water.
Cook over low heat, tossing or stirring, until the pasta is well coated and the chicken is heated through; add more reserved pasta water as needed to keep the pasta juicy and coated.
Divide among plates and serve topped with the toasted pine nuts.