Line a cookie sheet with parchment paper and set aside.
In a microwave safe glass bowl or 4 cup pyrex measuring cup combine the sugar and corn syrup. Microwave on high power for 3 minutes.
Carefully remove and stir in the peanuts. (Use hot pads or gloves, the bowl will be very hot).
Return to the microwave and cook on high power for an additional 3 minutes. Carefully remove from the microwave and add in the vanilla and butter. Stir to combine.
Return to the microwave and cook on high power for an additional 2 minutes. Carefully remove from the microwave and quickly stir in the baking soda until foamy.
Pour peanut brittle mixture out onto the parchment lined cookie sheet. Don’t spread the candy, allow it to set for 1 hour.
Once the brittle is set, pick up the parchment paper and drop in on the counter to crack the candy.
Notes
Calories are automatically generated. For best results calculate based on your exact ingredients.