Peanut Butter Fudge

My mother-in-law made this at Christmas and it was divine.

Peanut Butter Fudge
4 c sugar
1/2 c butter
1 (12 oz) can evaporated milk (fat-free is fine)
1 t vanilla
12 oz crunchy peanut butter
7 oz marshmallow creme

Boil sugar, butter and milk, stirring frequently until it forms a softball* (about 15 min). Remove from heat and add everything else. Stir by hand until it loses its gloss and becomes very thick (about 8minutes). Spread in lightly buttered pan and cool.

*Soft ball means you can drop a little in a cup of cold water, pull it out, and form a soft ball with it that keeps its shape pretty well.