Combine sugar, margarine, milk and
marshmallows in a 2-quart batter bowl.
Microwave on high 3 minutes; stir well.
Continue to microwave on high
2-3 minutes more, or until mixture boils.
Then microwave on 50% and
boil for 4 minutes.
Grate or chop chocolate into small pieces
and add to hot mixture.
Stir until chocolate melts.
Add pecans and pour
into an 8" square pan.
Let cool before cutting into squares.
Makes 2 pounds.
Store in airtight container.