Microwave Peanut Brittle by 
Elaine Remez
Source: Ilana
Ingredients
1 cup peanuts
1 cup sugar
1/2 cup corn syrup
1 t. vanilla
1 t. butter
1 t. baking soda
cooking spray
1 cup        
peanuts
1 cup        
sugar
1/2 cup        
corn syrup
1         
t. vanilla
1         
t. butter
1         
t. baking soda
Instructions
This recipe is done completely in a microwave on high power. 
Stir the sugar and corn syrup in a large microwave safe bowl. Cook on high for 4 minutes.
Stir in the peanuts. Cook on high for 3-5 minutes. Add the butter and vanilla and blend well. Cook for 1-2 minutes. Add the baking soda and stir until foamy. Spray a 1-1/2 quart casserole (13x9) pan with cooking spray. Spread the mixture in pan and let cool for 1/2 hour.