01 - Line two baking sheets with parchment paper or silicone mats to prevent sticking and ensure easy removal of finished pralines.
02 - In a heavy-bottomed saucepan over medium heat, combine granulated sugar, brown sugar, butter, heavy cream, milk, and salt. Stir constantly until the butter melts completely and the sugars dissolve into a smooth mixture.
03 - Attach a candy thermometer to the pan. Continue cooking, stirring occasionally, until the mixture reaches 236°F (soft ball stage), approximately 8–10 minutes. Monitor temperature carefully to achieve proper texture.
04 - Remove saucepan from heat immediately upon reaching temperature. Stir in vanilla extract and toasted pecans. Beat briskly with a wooden spoon for 2–3 minutes until mixture thickens and becomes creamy while remaining pourable.
05 - Work quickly and drop heaping tablespoons of the mixture onto prepared baking sheets, spacing each praline 2 inches apart to prevent them from sticking together as they set.
06 - Allow pralines to cool completely at room temperature for at least 20 minutes until firm and set to the touch. Do not refrigerate as this can affect texture.
07 - Transfer cooled pralines to an airtight container and store at room temperature for up to 1 week. Keep away from moisture and heat to maintain quality.