1. In large glass bowl; melt margarine on high for 1 minute (till completely melted).
2. Add sugar and evaporated milk.
3. Mix thoroughly with a whisk.
4. Microwave on high for 3 minutes.
5. Stir.
6. Microwave on high for 2 more minutes or until mixture boils.
7. Stir very well.
8. Scrape sides of bowl.
9. Microwave for 5 1/2 minutes more.
10. Then slowly stir in peanut butter. **
11. Stir in marshmallow cream.
12. Add nuts and vanilla and stir.
13. Pour into a 9" x 9" foil lined pan.
14. Refrigerate.
15. Cut into squares and turn out onto flat surface.

This recipe comes from by b'day twin and neighbor, Mary.  It is really good fudge!

** If mixture begins to get too thick while stirring in peanut butter, immediately add the marshmallow!