Preheat the oven to 350 degrees and prepare cookie sheets with parchment paper or silicone baking mats.
In a large mixing bowl, cream together the butter and shortening with the sugars until light and fluffy.
Add the eggs and vanilla and mix well.
In a separate bowl, combine the flour with the salt and baking soda. Add this to the wet ingredients and combine well.
Stir in the chocolate chips.
Scoop the cookie dough in 1.5 Tablespoon mounds onto the cookie sheets leaving at least 2 inches space between the cookies.
Bake for 9-11 minutes or just until the edges of the cookies are just starting to appear golden.
Remove the baking sheets from the oven and let the cookies rest on the cookie sheets for another 3-5 minutes before removing them to a wire rack to cool completely.
Store in an air-tight container.
