Pour the caramel into the prepared pan; press in the walnut halves, if using. Refrigerate until firm and set.
Slice into squares or as desired. Wrap individual pieces in wax paper or place in small, individual baking papers.
*If you using corn syrup, the caramel will most like take a shorter time to cook.
https://glutenfreerecipebox.com/microwave-caramel-recipe-gluten-free-corn-free-nuts-optional/