Easy Microwave Fudge

1½ sticks margarine or butter
3 C. sugar
1 5-oz. can evaporated milk (2/3 C.)
1 bag (12 oz.) semi-sweet chocolate chips
1 t. vanilla
1 7-oz. jar Marshmallow Crème  
chopped nuts, optional

1. In large GLASS bowl (4 qt. or larger), melt margarine in microwave on HIGH for ONE minute. 

2. Add sugar and evaporated milk and stir. 

3. Microwave 3 minutes, then stir. 

4. Microwave 2 minutes, then stir. 

5. Microwave 3 minutes, then stir.

6. Microwave 2½ minutes and remove. 

7. Stir in chips, vanilla and marshmallow crème.  Add chopped nuts, if desired.  Stir together. 

8. Pour into prepared lightly greased 9x9x2 inch pan. 

9. Cool and refrigerate overnight in air tight container.