As of 2015, Kellogg's does not make a peanut butter flavor of Rice Krispies. However, there are a number of recipes on the Kellogg's site that use peanut butter with the original Rice Krispies product.
Kellogg's currently makes Rice Krispies cereal in the following flavors: Original, Gluten-Free, Cocoa Krispies, Frosted Krispies and Rice Krispies Treats.
The original Rice Krispies product was first produced in 1927, and it became known as the "talking" cereal because of the snapping noise it makes in milk. The most popular recipe using Rice Krispies is for Rice Krispies Marshmallow Treats. The recipe was first advertised in 1940, and the treats were often mailed to servicemen overseas. Current versions of the treat often contain peanut butter, but a peanut butter flavor of the cereal itself is not in production.
Recipes for Chocolate Yummies, Chocolate Scotcheroos, Peanut Butter and Jelly Crisps, Peanut Butterscotch Bites and many other peanut butter-based recipes are listed on the Kellogg's website. The Peanut Butter Treats recipe is a simple twist on the classic treat recipe, and to make the dessert, add 1/2 cup of peanut butter to 3 tablespoons of butter and a package of mini marshmallows that have been melted in a saucepan. Stir in six cups of Rice Krispies cereal, press into a 13 x 9 pan, and let the mixture cool before slicing into squares.