Add 1/4 cup of the milk to a cup and warm it up in the microwave until it's lukewarm. Add the yeast to the milk, a tsp of sugar and mix well. Let the yeast mixture sit for about 10 min until it froths up and bubbles.
Melt the butter in a sauce pan or in the microwave. In a mixer add the melted butter and sugar and mix until the sugar and butter are well incorporated. Add the eggs and continue mixing until the mixture is light. Add the yeast mixture, remaining milk, salt and continue mixing until everything is well incorporated.
Start adding the flour half a cup at a time and mix well. The dough is ready when it no longer sticks to your hands. Add additional flour if you need it.
Let the dough rise until it doubles in size, make sure you cover it with a clean damp towel or plastic wrap, about an hour to an hour and a half.
Preheat your oven to 375 degrees.
On a floured surface cut the dough into 6 equal pieces and shape each piece into a ball. Set aside and cover with wrap, we'll work with one ball at a time. Roll out a ball into a circle that's about 12 to 14 inches in diameter. Using a pizza cutter, cut the dough into either 6 equal pizza slices or 8, depends how big you want your rolls. Drop a teaspoon of Nutella at the top of each slice, you can spread it around or just leave it as one big dollop. Starting at the top roll out each piece and shape into a crescent.
Repeat with the remaining balls. Put the sweet rolls onto an ungreased baking sheet. Before you put them in the oven, brush them with egg wash so they will turn out nice and shiny. Bake for about 20 minutes or until golden brown.