📝 Instructions

1. 1 Preheat oven to 180C grease and line 900g loaf tin
2. 2 Beat butter and sugar until pale and fluffy
3. 3 Beat in eggs one at a time
4. 4 Fold in flour baking powder and salt alternating with milk
5. 5 Divide batter evenly into two bowls
6. 6 Stir cocoa into one half
7. 7 Spoon alternate dollops into tin
8. 8 Run knife through batter to create marble
9. 9 Bake 40-45 mins until skewer clean
10. 10 Cool in tin 10 mins then transfer to rack