White Chocolate Peanut Butter Cookie Clusters (no-bake, gluten-free)

(16 ounces) vanilla Caniquik, coarsely chopped (white almond bark or white chocolate chips may be substituted)

heaping 1/2 cup creamy peanut butter (do not use natural or homemade; use conventional Jif, Skippy, or similar)

Rice Krispies cereal or similar gluten-free crispy rice cereal (plus 1/4 cup cereal, only if necessary; see directions below*)

peanuts

miniature marshmallows