baked: streusel topped banana muffins (with a surprise)

Anybody who has had my baked goods knows my sneaky little habit. I love putting things in the centre of my baked goods for a delightful little boost of flavour. While eating an ordinary cupcake or cookie is always a treat, who doesn't love finding a surprise centre?! ( Assuming it is not one of my long hairs or a bug, both of which are not unheard of in my baking :p )
You can imagine the gears turning in my head when I saw this recipe on How To Simplify's website ( one of my favourite foodie sites ).

The first thing I always reach for when in need for a yummy centre? NUTELLA! Because really, who doesn't love the stuff?