The sweet and salty combination of dulce de leche and peanut butter, along with cinnamon and hearty oatmeal make these Peanut Butter Cinnamon Dulce de Leche Oatmeal Cookies totally irresistible. Of course, we are all familiar with the necessary virtue of peanut butter in our everyday lives.But, what is dulce de leche? In Spanish, the words “dulce…