Peanut Brittle

Mix well the first three ingredients in a large glass bowl. Microwave for 4 minutes on high. Stir well. Microwave for another 4 minutes on high. To the mixture, add the butter, vanilla extract, and salt. Microwave two more minutes. Add the baking soda and stir rapidly. Pour quickly into a 9" x 13" buttered pan. When cool, remove and break into pieces. The temperature at which to set your microwave varies according to its maximum power. If your microwave is 700 watts, as mine is, I suggest that you use a slightly lower setting, such as medium high, or you may have trouble with the mixture burning.