01 - In a large mixing bowl, cream together the softened butter, packed light brown sugar, granulated sugar, and salt until the mixture is light and fluffy, approximately 2-3 minutes.
02 - Add the whole milk and pure vanilla extract to the creamed mixture. Mix thoroughly until all ingredients are fully combined.
03 - Gradually stir in the heat-treated flour until fully incorporated, ensuring no dry streaks remain in the dough.
04 - Fold the mini chocolate chips into the dough using a spatula or wooden spoon until evenly distributed throughout.
05 - Scoop 1-tablespoon portions of dough and roll between your palms into smooth, uniform balls. Arrange on a parchment-lined baking sheet.
06 - Place the baking sheet in the freezer for 20-30 minutes until the dough balls are completely firm to the touch.
07 - Place the chopped chocolate and coconut oil, if using, in a microwave-safe bowl. Melt in 20-second bursts, stirring between intervals until completely smooth.
08 - Remove chilled dough balls from the freezer. Using a fork or dipping tool, submerge each ball into the melted chocolate, rotate to coat evenly, and allow excess chocolate to drip off before returning to the baking sheet.
09 - Transfer the dipped truffles to the refrigerator for 15 minutes until the chocolate coating is completely set and firm.
10 - Transfer cooled truffles to an airtight container and refrigerate for up to 1 week until ready to serve or gift.