1. Preheat your oven to 325°F (165°C) and line a baking sheet with parchment paper.
2. In a bowl, whisk together flour, baking soda, and salt.
3. In another bowl, mix melted butter with brown and granulated sugars until smooth. Add the vanilla extract, whole egg, and egg yolk. Mix well.
4. Gradually combine the dry ingredients with the wet ingredients, stirring until just combined. Fold in the chocolate chips.
5. Drop tablespoonfuls of dough onto the prepared baking sheet, spacing them about 2 inches apart.
6. Bake for 10-12 minutes or until the edges are golden brown.
7. Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.

Notes:

• For an extra crispy texture, ensure your butter is fully melted and the cookies are baked until just golden around the edges.
• Storing the dough in the refrigerator for 30 minutes before baking can help in handling the dough better and also enhance flavor.
• These cookies store well in an airtight container for up to a week.