Peanut brittle, microwave version

Tomorrow is the Fall party at Cee's school and she did not want to bring the usual cliched items such as cookies or cake so she asked me to make peanut brittle. This batch is slightly burnt because microwaves do vary and I cooked it a little too long but here is the recipe.
1 1/2 cups uncooked peanuts with skins still on
1 cup sugar
1/2 cup white corn syrup
1/8 tsp salt
1 tsp butter
1 tsp vanilla extract
1 tsp baking soda
(have everything ready, this goes quite fast)
Grease cookie sheet with a tiny amount of butter, save rest for recipe
In a 1 1/2 quart microwave safe container (glass), stir together peanuts, sugar, syrup and salt. Microwave on high for 4 minutes, remove and stir well. Return to microwave and cook on high for 3 to 4 minutes, depending on color (should be light brown).
Stir in butter an vanilla (it will splatter) and cook for 2 more minutes. Remove and add baking soda. Mixture will become light and foamy. Immediately pour onto a lightly greased baking sheet or marble slab (we all have those :P)spreading thin. When cool break into small pieces. Store in an airtight container (if it lasts that long). Makes 1 pound.
Some disclaimers and cautions:
Use uncooked peanuts.
This mixture gets extremely hot(400 degrees F), it is not a project for kids.
Do not lick the spoon until it is cold!
Burnt peanut brittle is OK for family but not to give away.
Clean up is very easy, just soak in hot water.