Bring sugar and Karo syrup ... heat and add peanut butter. Stir until smooth. Add the Rice Krispies gradually to the mixture and ... Place on wax paper.
Combine syrup, sugar and butter in pan; bring to a boil. Reduce heat, add peanut butter, stirring until melted. Pour mixture over Rice Krispies in large mixing bowl, stir ... cool. Cut into bars.
Mix corn syrup and sugar ... boil, then add peanut butter and vanilla. Remove from heat. Stir. Mix in Rice Krispies; press mixture into greased ... and spread over bars.