Preheat your oven to 350°F (175°C) and grease a loaf pan with nonstick spray or butter.

In a large bowl, whisk together flour, cocoa powder, sugar, baking powder, and salt.

In another bowl, beat the eggs until frothy. Stir in the melted butter and milk until smooth.

Combine wet ingredients with dry ingredients and fold in melted dark chocolate for the hidden heart.

Pour half of the batter into the prepared loaf pan. Create a well in the center and pour in additional melted dark chocolate before covering with the remaining batter.

Bake for 50-60 minutes or until a toothpick inserted comes out clean (excluding the molten center). Allow cooling slightly before serving.