In a large bowl, add the warm water and sprinkle over the yeast. Set aside for 5 minutes so it can activate.

Once the yeast activates and becomes foamy add the milk, melted shortening, sugar, salt, eggs, and 1/2 of the all purpose flour. Mix until everything is well incorporated.

Add the remaining all-purpose flour and mix until the dough is smooth and slightly sticky.

Place the dough into a greased bowl, cover it, and let it rise for 2 hours.

Lightly flour your working surface and knead the dough for a minute or two.

Gently roll the dough 1/2-inch thick with a floured rolling pin.

Cut donuts using a donut cutter or round drinking glass.

Cover the donuts and let them rise for 45 minutes.

Heat some vegetable oil to about 350 degrees and then fry the doughnuts for about 2 minutes on each side or until golden brown.

Sprinkle some powdered sugar on top of the donuts.

Using a skewer make a hole on the side of the donut and then stuff it with Nutella using a piping bag.