01 - Melt butter in a medium saucepan over medium heat. Continue cooking, swirling occasionally, until foaming subsides and butter turns deep golden with a nutty aroma, approximately 5–7 minutes. Transfer to a large mixing bowl and cool for 10 minutes.
02 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
03 - Add dark brown sugar and granulated sugar to the cooled brown butter. Whisk thoroughly until completely smooth and well incorporated.
04 - Beat in eggs one at a time, followed by vanilla extract and milk. Mix until fully blended and smooth.
05 - In a separate bowl, whisk together all-purpose flour, baking soda, baking powder, and sea salt until evenly distributed.
06 - Gradually fold dry ingredients into the wet mixture until just combined. Avoid overmixing to prevent tough cookies.
07 - Gently fold in chocolate chips, caramel bits, and toffee bits until evenly distributed throughout the dough.
08 - Scoop approximately 2 tablespoons of dough per cookie onto prepared baking sheets, spacing at least 2 inches apart. Sprinkle with flaky sea salt if desired.
09 - Bake for 10–12 minutes until edges are golden brown and centers appear slightly underbaked. This ensures a chewy, tender texture.
10 - Let cookies rest on baking sheets for 5 minutes to set, then transfer to a wire rack to cool completely.