Line two large baking sheets with parchment paper or silicone baking mats. Set aside.
Add the granulated sugar, brown sugar, evaporated milk, butter, corn syrup, and salt to a heavy-bottomed medium saucepan.
Cook over medium heat, stirring gently until the butter melts and the sugars dissolve.
Attach a candy thermometer to the saucepan. Bring the mixture to a steady boil and cook until it reaches 236°F to 238°F.
Immediately remove the saucepan from the heat and let the mixture rest for one minute.
Add the vanilla extract and pecans.
Stir steadily for two to four minutes or until the mixture thickens, becomes slightly creamy in appearance, and begins losing some of its shine.
Working quickly, drop heaping tablespoonfuls of the praline mixture onto the prepared baking sheets.
Let the clusters cool at room temperature for about 30 minutes or until completely firm.
Remove the praline clusters from the parchment paper and serve or transfer to an airtight container.