01 - Line a baking sheet with parchment paper or a silicone baking mat, ensuring a non-stick surface for the pralines.
02 - In a heavy-bottomed saucepan, combine the granulated sugar, packed light brown sugar, whole milk, unsalted butter, and fine sea salt. Place over medium heat and stir continuously until the butter is completely melted and the mixture comes to a full, rolling boil.
03 - Attach a candy thermometer to the side of the pan, ensuring it does not touch the bottom. Continue to boil the mixture, stirring frequently, until it reaches 238°F (soft-ball stage). This typically takes 8–10 minutes.
04 - Promptly remove the saucepan from the heat. Immediately stir in the pure vanilla extract and pecan halves. Continue stirring vigorously for 2–3 minutes until the mixture begins to thicken and achieve a creamy, yet still pourable, consistency.
05 - Working swiftly before the mixture sets, drop tablespoonfuls of the praline mixture onto the prepared baking sheet. Ensure adequate spacing between each praline. Allow them to cool completely at room temperature until they are fully set, which usually takes approximately 20–30 minutes.
06 - Once fully set, store the finished pralines in an airtight container at room temperature for up to one week to maintain their freshness and texture.