In bowl, add warm milk and 2 tbsp of sugar. Dissolve the yeast and let it sit for 10 min. Cover with clean cloth or plastic wrap.
Whisk in the eggs, remaining sugar, 3 Tbsp of melted butter and vanilla. Add the flour and salt. Mix well to combine. Knead for 8-10 into a soft dough, though slightly sticky.
Cover with clean cloth or plastic wrap and let it rise at room temperature for 2 hours or until the dough has doubled in size.
Prepare the base
Once dough has risen, divide it into 2 halves. Dust a clean work surface with flour and place 1 piece of dough in the center. Roll into an even 12″ wide by 16″ long rectangle. Spread the nutella up to the edges. From the shorter side, roll the dough up tightly.
Cut the roll lengthwise in half with a sharp knife. Keep the top ½″ of the roll connected and twist the halves together a few times.
Repeat the same for the other dough ball.
Butter and line 2 loaf pans with parchment paper. Carefully transfer each dough onto the prepared pans. Cover with the same clean cloth or plastic wrap and let rise for 30-45 min at room temp.
Bake!
Meanwhile, preheat the oven to 180˚C.
Brush loaves with remaining 1 Tbsp melted butter. Bake at 180˚C for 15-20 minutes or until the top of each loaf is browned.
Once the loaves are baked, remove and place them on a wired rack to cool.