Preheat oven to 350 degrees and line a mini cupcake pan (12) with liners or coat with non stick spray. Add all dry ingredients to a small bowl, whisk well.
Add butter, cream cheese, and vanilla extract to a stand mixer or large bowl. Cream until light and fluffy. Add one egg at a time, mix between additions.
Slowly add dry ingredients to wet ingredients. Pour in milk and mix just until incorporated and smooth. Fold in chocolate chips. Divide and portion batter into prepared cupcake pan. Bake for 18-20 minutes until a toothpick comes out clean when poked through the center of each muffin.