Dad's Favorite Chocolate Chip Cookies

I found this recipe {after trying several} in the book "The search for the perfect chocolate chip cookie". I think it's a great thick, soft cookie. I love the different chips. I have listed the ingredients in the order they need to be added. There are certain recipes, mostly in baking, you will find that I am a extremely particular in how they are to be made. I have tried to explain why they must be done that way, so that you achieve the best possible result. Always, make sure you use BUTTER and REAL vanilla extract, it makes all the difference in the world!

Makes about 8 1/2 dozen cookies.

2 c. butter
1 c. sugar
2 1/2 c. brown sugar, firmly packed
1 1/2 tsp. baking soda
1 1/2 tsp. salt
3 eggs
2 Tbsp. vanilla extract
6 c. flour
3 c. semi-sweet chocolate chips
3 c. milk chocolate chips
2 c. chopped pecans {optional}

Cream butter, sugars, baking soda & salt until fluffy and butter is completely incorporated {no chunks}. Do not overmix - doing so at this point will make your cookies flat!
Add eggs & vanilla. Add flour and mix until all the flour is incorporated. Once again do not overmix - doing so at this point will make your cookies tough.
Add chips and nuts. Using a cookie scoop, make balls and gently flatten somewhat on the baking sheet. Bake at 350 degrees for 7-9 minutes. Bake until slightly brown around the edges and it looks "set".