Marble cake by Nora

Ingredients:

• 300g flour
• 300g butter
• 300g sugar
• 1 tablespoon baking powder
  
• 4 eggs
• 150g chocolate powder

1. Mix the sugar and the eggs in a bowl. Add the softened butter and mix well.
2. Add the flour of and baking powder. Mix. Divide in two the mixture. Mix the chocolate powder with half the mixture.
3. Pour the chocolate mixture into greased cake tin. Then add the rest.
4. Cook for 40 minutes at 180º.