Preheat the oven to 350℉. Lightly spray a muffin pan with cooking spray and set aside.
In a large bowl, cream together the butter, Nutella and sugar until light and fluffy. Mix in the eggs one at a time until smooth.
In a separate bowl, mix together the flour, baking powder, baking soda and salt.
Alternate between mixing the flour mixture and the yogurt into the wet ingredients. Mix until just combined.
Using an ice cream scoop, scoop the batter into the prepared muffin pan and bake in the preheated oven for around 20 minutes, or until a toothpick inserted comes out clean.
Allow to cool for around 5 minutes in the pan before transfering to wire racks to cool completely.