Warm your milk up until it is luke warm (either in the stove or in the microwave). Once your milk is the right temperature, pour it into a large bowl. Add the sugar and the yeast. Combine together with a whisk very briefly, for 1-2 seconds. Let it sit for 5 minutes.
After the five minutes, add the melted butter, 600g / 5 cups flour and salt to the yeast bowl. Spoon it together (it will be quite wet and will look lumpy at this stage). Then, add your dough to a standing mixer with a dough mixer attached. Place it on a slow speed and allow the dough to come together in the mixer. Add the rest of the flour (100g / 1 cup) as it mixes. A dough ball should form and the dough should pull away from the sides of the mixer. When it does, you can stop the mixer. Add slightly more flour if needed. Once ready, cover your bowl with a towel and let it rise for 30 minutes. Ideally let the dough rise in a warm area.
Pre-heat your oven to 180°C/ 356°F.
Chop your apples into small cubes. Add 1 tablespoon of butter to a frying pan on a medium-high heat and let it melt. Add the apples and let them fry for a couple of minutes. Then, add the cinnamon and light brown sugar. Allow the sugar to melt and come together with the apples. Then set this aside.
After the 30 minutes is up, flour a clean surface generously. Put the dough onto the surface then scatter some more flour on top. Use a rolling pin to roll the dough out into a large rectangular shape which is around 1-2cm thick.
Add the apples to the dough evenly. If the apples have released too much water, only spoon out the apple chunks onto the dough (not the liquid it is sat in) so that it doesn't get too wet. Then, scatter the cinnamon sugar on top, evenly. Once this is done, roll the dough up!
Cut the rolled dough into 9 even portions. I cut the ends off and don't use these as they aren't very pretty! If you use the ends, you should have about 11 individual rolls. Add them to a greased baking tray. Bake for 20 minutes.
In a bowl, combine the icing sugar, vanilla, milk and melted butter with a whisk. Set aside.
When the cinnamon apple rolls are out of the oven, pour the frosting on top whilst they are still warm. Then, devour! I hope you love these as much as I do.