Preheat your oven to 350°F (175°C) and prepare two 9-inch round cake pans by greasing and dusting them with flour.

In a large mixing bowl, sift together the all-purpose flour, granulated sugar, unsweetened cocoa powder, baking powder, baking soda, and salt.

In a separate bowl, whisk together the eggs, whole milk, vegetable oil, and vanilla extract until well combined.

Pour the wet mixture into the dry ingredients and mix until just combined, then gradually add the boiling water.

Gently stir in the orange zest and juice, then fold in the chocolate chips.

Divide the batter equally between the prepared pans and bake for 30 to 35 minutes.

Let the cakes cool in the pans for 10 minutes before inverting onto wire racks to cool completely.

Prepare the ganache and spread it between the cake layers and on top, garnishing with fresh orange slices.