• Start by combining the yeast, warm milk and sugar in a large bowl or the bowl of a stand mixer. The milk should be just warm to the touch but not hot. Let bloom for 5 minutes – it should look 'bubbly'.
• To that bowl, add in one whole egg and egg yolk and the melted butter. Mix to combine. Add the flour and mix to form a dough.
• Knead for 8-10 minutes. Spray the bowl with some oil and let rise in a warm place for about an hour (until doubled in size).

For the Filling/Assembly

• Line a 9x9" square dish with baking parchment.
• Make the filling by combining the butter, cinnamon and Nutella (make sure it is room temp, or it'll be hard to mix) in a bowl to form a paste. Set aside.
• Once the dough has doubled in size, tip onto lightly floured surface. Use a rolling pin to roll to about 15×8 inches. Spread the Nutella filling over the dough in an even layer.
• Starting with the long side, roll the dough away from you to form a tight log. Use a sharp knife to cut about 9 rolls. Place into the lined dish. Let rest 30 minutes.
• Preheat the oven to 360℉/175℃. If using, pour over the cream then bake the tray of sweet rolls for about 18-20 minutes: until a light golden color. Remove and let cool.

For the Frosting

• Make the frosting by whisking the cream cheese and Nutella together on high for several minutes, until fully combined and no lumps remain. Add the powdered sugar and milk and whisk again. Add extra milk if needed for a spreadable consistency.
• Spread this frosting over the cinnamon rolls. Top with fresh strawberries, chocolate chips or anything else you like! Serve and enjoy!