In a mixing bowl, combine flour, sugar, salt, and yeast. Mix well.

Add warm milk, melted butter, and egg to the dry ingredients. Mix until a dough forms.

Knead the dough on a floured surface for about 5 minutes until smooth. Place in a greased bowl, cover, and let rise for 1 hour.

Preheat the oven to 375°F (190°C).

Roll out the dough into a rectangle about 1/4 inch thick.

Spread Nutella evenly over the dough. Roll the dough tightly into a log.

Cut the log into 12 equal pieces and place each piece in a greased muffin tin, cut side up.

Let the cruffins rise for another 30 minutes.

Bake in the preheated oven for 20-25 minutes or until golden brown.

Remove from the oven and let cool slightly before dusting with powdered sugar.