Cocoa Marble Cake

Instructions:

1. Preheat oven:
   Preheat your oven to 180°C (350°F). Grease and flour a loaf pan.

2. Prepare the batter:
   In a large bowl, beat the eggs with the sugar until light and fluffy. Add the milk, oil, and vanilla extract, and mix well.

3. Add dry ingredients:
   Sift in the flour, baking powder, and salt. Mix until smooth and lump-free.

4. Make the cocoa layer:
   Divide the batter in two. In one half, mix in the cocoa powder until fully incorporated.

5. Create the marble effect:
   Pour the plain batter into the prepared loaf pan, then add the cocoa batter on top. Use a knife or skewer to gently swirl the two batters together to create a marble pattern.

6. Bake:
   Bake for 35–45 minutes, or until a toothpick inserted in the center comes out clean.

7. Cool and serve:
   Let it cool in the pan for 10 minutes, then transfer to a wire rack. Slice and serve once completely cooled.