Line a large baking pan or cookie sheet with parchment paper and grease with butter.
Combine the sugar, corn syrup and salt in a small saucepan over medium heat. Stir constantly until it starts to boil. Let it cook without stirring for 5 minutes until golden brown. Add the peanuts and cook for another 2 minutes.
Remove from heat and add the butter, baking soda and vanilla. Stir to combine. Pour the mixture on the prepared pan and spread nicely with a spatula. Let it stand for few minutes until hardened before cutting into pieces. Ready
Notes
Raw peanuts are best.
Recipe by Gluten-Free by Jan at https://glutenfreebyjan.com/gluten-free-peanut-brittle/