01 - Set the oven to 350°F (175°C). Grease the mini bundt pans thoroughly.
02 - In a large bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt until well incorporated.
03 - In a separate bowl, blend sugar and eggs until pale. Whisk in melted butter and vanilla extract until homogeneous.
04 - Gradually add the wet ingredients to the dry, alternating with milk, stirring gently after each addition. Fold in chocolate chips evenly.
05 - Distribute the batter evenly into the prepared mini bundt pans, filling each cavity about two-thirds full.
06 - Place pans in the oven and bake for 20 to 25 minutes, or until a toothpick inserted comes out clean.
07 - Allow cakes to rest in pans for 10 minutes before unmolding onto a wire rack to cool completely.