01 - Place unsalted butter in a medium saucepan over medium heat. Cook, stirring frequently, until fully melted and the milk solids brown and emit a nutty aroma, about 4 to 5 minutes. Transfer immediately into a large mixing bowl and allow to cool for 10 minutes.
02 - Add light brown sugar and granulated sugar to the cooled brown butter. Whisk thoroughly until the mixture is smooth and glossy.
03 - Add eggs, one at a time, mixing thoroughly after each addition. Stir in whole milk and pure vanilla extract until well blended.
04 - In a separate mixing bowl, combine all-purpose flour, baking soda, baking powder, and fine sea salt. Whisk until evenly distributed.
05 - Gradually fold the dry ingredients into the wet mixture, mixing just until a cohesive dough forms. Do not overmix.
06 - Fold in semisweet chocolate chips, chopped caramel candies, and crushed mini salted pretzels until just incorporated.
07 - Cover the dough and refrigerate for at least 30 minutes (up to 24 hours) to enhance flavor and texture.
08 - Preheat oven to 350°F. Line baking sheets with parchment paper.
09 - Scoop 2-tablespoon portions of dough onto prepared sheets, spacing 2 inches apart. Sprinkle each portion with a pinch of flaky sea salt.
10 - Bake for 11 to 13 minutes until edges are golden and centers remain soft. Allow cookies to cool on the baking pan for 5 minutes before transferring to a cooling rack to cool completely.