chocolate chip cookies

This is a recipe I got from my MIL. Hers makes 7 dozen, (I can't have that many cookies laying around-or I'll eat them) so I scale it back to 2/3 of the recipe. That's just enough to have some for a couple of days of snacks and some to give away. Aaron made these with the boys today to give to our new friends downstairs and the RS presidency that stopped by today.
1 c. sugar
1/2 c. shortening
1/2 c. butter or margarine
1/2 c. brown sugar
2 tsp. vanilla
2 eggs
2 2/3 c. flour
1 tsp. salt
1 tsp. baking soda
8 oz chocolate chips (okay I usually still use the whole bag)

Have all ingredients at room temperature. Cream together sugar, shortening and butter. Add remaining ingredients and mix well. Drop on ungreased cookie sheet by teaspoonfuls, about 2 inches apart. Bake at 350 F for about 8-10 minutes. Cool on wire racks. Makes about 4 dozen (2/3 of 7 doz. is a messy number).