01 -
Set oven to 175°C and line baking sheet with parchment paper.
02 -
In a large bowl, beat softened butter, brown sugar, and granulated sugar on medium speed using an electric mixer until pale and fluffy, about 3 minutes.
03 -
Add egg and vanilla extract to the mixture, and blend until fully combined.
04 -
In a separate bowl, whisk all-purpose flour, baking soda, and salt. Gradually add to wet mixture, stirring just until combined. Avoid overmixing.
05 -
Gently fold in butterscotch chips, dark chocolate chunks, and nuts (if using) until evenly dispersed.
06 -
Cover dough with plastic wrap and refrigerate for a minimum of 30 minutes to enhance flavor and achieve extra gooey texture. This step is optional if time-constrained.
07 -
Drop rounded dough portions onto prepared sheet, spacing at least 5 centimeters apart. Bake for 10–12 minutes, until edges are golden and centers appear slightly underbaked.
08 -
Let cookies cool on baking sheet for 5 minutes, then transfer to wire rack to cool completely. Serve warm or store in an airtight container.