1. Mix flour, baking soda and salt. Set aside.
2. Mix melted butter, brown sugar and white sugar until blended thoroughly. Add vanilla, egg and egg yolk. Blend until light and creamy.
3. Mix in dry ingredients – a little at a time – until just blended. Stir in chocolate chips and pecans.
4. Chill the dough 30-60 minutes or overnight (or put in freezer to speed up process).
5. Preheat oven to 325º F. Drop cookie dough ¼ cup at a time (or really large spoonfuls) onto greased cookie sheet 2-3 inches apart.
6. Bake 15-20 minutes or until edges are lightly toasted. Do NOT wait until they’re brown all over!
7. Cool on the cookie sheet (or rack for crispier cookies).