Preheat oven to 375 degrees.
In a stand mixer, cream the shortening and brown sugar together until smooth. Mix in the egg just until fully incorporated. Blend in the milk and vanilla.
In a medium bowl, combine the flour, salt, and baking soda. Whisk to combine.
With the mixer running on low speed, gradually mix the flour mixture into the shortening mixture. Increase the speed to medium, and beat until full incorporated. Stir in the chocolate chips.
Use a cookie scoop to portion dough into balls, and line them up about 3 inches apart on baking sheets lined with parchment or a silicone mat. (If you don't have a scoop, each dough ball should measure about 2 tablespoons.)
Bake for approximately 10 minutes, just until the edges of the cookies are slightly brown. Do not overbake! Cool pans on wire racks for 5 minutes, and then move the cookies directly onto the racks to cool completely.