Best Peanut Brittle Recipe (in microwave)

1 1/2 cups unsalted dry roasted peanuts
1 cup granulated sugar
1/2 cup light corn syryp
1/8 teaspoon salt
1 Tablespoon butter or margarine
1 teaspoon vanilla
1 teaspoon baking soda
In glass mixing bowl combine peanuts, sugar, corn syrup and salt. Cook on 100% power for 7 minutes ( my microwave did 6 minutes so be careful!)
Quickly stir in butter and vanilla. cook on high 1-2 minutes longer.
Add baking soda, stir quickly just until mixture is foamy.
Pour immediately onto greased baking sheet. Let cool about 15 minutes until firm. Break peaunt brittle into pieces; store in airtight container. Makes about 1/ 1/4 pounds.