In a medium sauce pan combine the sugar and milk. Bring to a full boil. Boil the milk and sugar mixture for 2 minutes.
After 2 minutes, remove from the heat and add in the peanut butter and vanilla. Mix well and pour into an 8 x 8 pan. Top with chocolate chips if you like. Let cool completely before slicing into squares.
Recipe by Daily DIY Life at https://www.dailydiylife.com/easiest-peanut-butter-fudge-recipe/