Preheat oven to 350 degrees and grease two loaf pans (or one Bundt pan).

In the bowl of a stand mixer (or a large bowl with a hand mixer), cream the eggs and sugar for 2-3 minutes until pale, creamy and whipped. Add in the mascarpone and keep whipping until it's all creamy. Add the milk, butter, and vanilla and beat until combined.

In a separate bowl, whisk together the dry ingredients. 

Add into the wet ingredients and FOLD into the batter gently until fully combined. 

Add in the chocolate chips and fold again until evenly distributed.

Pour into the prepared baking pans and bake for 40-50 minutes until golden.

Remove from oven, let them sit in the baking pan for 5 minutes or so then invert on a wire rack to fully cool.

Once cool, wrap in plastic wrap or store in a Ziplock. This will preserve the texture. If you make it into a Bundt Cake, keep inside a cake dish, covered.