Line a large sheet pan with parchment paper and lightly butter the parchment paper.
Add the sugar, butter, salt and the light corn syrup to the inner pot of the Ninja Foodi or a deep pot on the stove. Turn the sear/sauté on high on the Foodi and use medium high on the stove. Stir the mixture until the sugar has dissolved and the butter has melted. Once that has happened, stop stirring.
Let the sugar mixture come to a boil and when it reaches 300°F/149°C, turn the Ninja Foodi or the stove off. It is important that you reach the 300℉/149℃ for the candy to set up correctly. Lower temperatures will result in a chewy brittle.
Add in the vanilla extract, baking soda, and peanuts and stir to combine. Immediately pour the mixture out onto the parchment lined pan. Pour the brittle in the middle and it will spread out on it's own.
Let the peanut brittle sit on the counter for about 15 minutes to cool. When it is cool enough to handle, you can break it into pieces. Serve & Enjoy!