Preheat oven to 375 degrees F. Line mini muffin tins with paper liners and set aside.
In a large bowl, cream sugar and shortening until light and fluffy. Beat in egg, then milk and vanilla.
In a separate bowl, combine the flour, baking soda, baking powder, and salt. Add to creamed mixture just until combined. Fold in the mini chocolate chips.
Using an ice cream scoop spoon about 1 tablespoon of batter into prepared mini-muffin tins.
Bake at 375F until a toothpick inserted in the center comes out clean, 10-12 minutes.
Cool in pans for 5 minutes before removing to wire racks. Serve warm.