Line a cookie sheet with a silicone mat. Set aside
Add granulated sugar, light brown sugar, corn syrup, water, and a pinch of salt in a saucepan.
Over low-medium heat, stir the mixture until the sugars are dissolved.
Add in the pecans and mix well.
Keep cooking until the temperature reaches 300 degrees F. Stir FREQUENTLY.
Remove the saucepan from the stove once the mixture has reached the temperature.
Quickly add in the butter, vanilla, and baking soda. Stir well.
Pour the mixture on the prepared cookie sheet and spread evenly.
Let it cool completely.
Once the mixture is cooled, break it into pieces.
Notes
Use a silicon mat: This is the best way to prevent sticking. Keep stirring: It's important to stir the mixture often, otherwise it might stick to the pan and burn in places. Be patient: You'll need to wait for it to cool before breaking it into pieces. The amazing smell with make your mouth water but be patient - it's definitely worth it!