Microwave Peanut Brittle

Directions

1. 1
   In 1 1/2-quart casserole, stir first 4 ingredients.
2. 2
   Cook 8 minutes in microwave on High.
3. 3
   Stir well after 4 minutes.
4. 4
   Add margarine and vanilla; cook 1 minute on High.
5. 5
   Add baking soda and stir until light and foamy.
6. 6
   Immediately pour onto lightly buttered baking sheet.
7. 7
   Spread thinly.
8. 8
   When cool, break into pieces.