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  http://www.snapabite.com/blog/chocolate-chip-banana-cake/2012/12/09/

Chocolate Chip Banana Cake

Preparation time: 20 minutes
Cooking time: 1 hour
Serves: 12-14 slices

Ingredients

180 gr butter
220 gr sugar
30 gr vanilla sugar
300 gr self rising flour
4 banana(s)
4 egg(s)
3 tablespoon(s) of milk
3 tablespoon(s) of maple syrup
1 vanilla bean(s)
75 gr chocolate

Preparation

In a large bowl:
Cream butter.
Add sugar, vanilla sugar, egg yolks and the seeds of the vanilla bean. 
Mix until pale and fluffy.
Break each banana into smaller pieces and add them.
Mix until incorporated.

In a smaller bowl:
Beat egg whites until stiff.
(hold upside down above your head to test the stiffness!)

In 3 times: add flour to the butter sugar mixture.
Now gently fold in the egg whites.
Cut the chocolate into small chunks.
Add it to the dough and gently fold it in.
Pour the dough into a greased and flowered pan.
Bake for 1 to 1 1/4 hours.

Tips

Leave out the chocolate if you're not really into chocolate!


source:

adapted from A swoonful of sugar