Ingredients:

1 cup corn syrup
3/4 cup peanut butter
1 1/2 cups chocolate chips semi sweet or dark are best
1 tsp vanilla extract
2 cups roasted peanuts salted or unsalted

Instructions:

You will need to pay constant attention to this mixture as it cooks, stirring almost constantly or the mixture will burn. Be very careful. It will get quite hot.
Lightly grease the bottom and sides of a 9×9 inch pan and line both the bottom and sides with parchment paper.
Heat the corn syrup over medium-low to medium heat until it is hot and almost boiling, stir in the peanut butter and vanilla and heat for another couple of minutes before stirring in the chocolate chips.
Boil this mixture gently for 4 minutes only, stirring and scraping the entire bottom of the pan as it cooks. A silicone spatula is ideal for this.
Remove from heat and stir in the peanuts.
Carefully add the mixture to the prepared pan. You will need to use the back of a tablespoon or a silicone spatula to press and spread the mixture evenly into the pan.
Let cool completely for several hours at room temperature before lifting the batch out onto a cutting board and cutting into 25 – 36 squares with a large sharp knife. I prefer them smaller because they are very candy-like.
Store in an airtight container with sheets of parchment paper between the layers if you are stacking them.

From: https://www.rockrecipes.com/eat-more-bar-squares