Combine the cake mix and milk

• Pour the cake mix into the mixer bowl.
• Instead of the water listed on the box, add the milk.

Add the eggs

• Add the eggs the box asks for, then add one extra egg.

Swap the oil for melted butter

• Instead of the vegetable oil, pour in the melted butter.

Mix the batter

• Mix everything until the batter is smooth.

Bake the cake

• Pour the batter into the pan.
• Bake at 175 °C for 35 minutes, until a skewer comes out clean.

Cool and serve

• Let the cake cool slightly before slicing.