Dough
Combine 2 cups flour, sugar, dry yeast, and salt in a large mixer bowl and stir until blended.
Place water and butter in a microwave-safe bowl.
Microwave for 45 seconds. Then microwave for 30 seconds. Be sure to split this up so the butter doesn't splatter.
The cup should be warm to the touch but not hot.
Add the egg and the warm water/butter
Beat 2 minutes at medium speed with an electric mixer and dough hook, scraping bowl occasionally.
Add 1 cup flour; beat 2 minutes at high speed, scrape the bowl.
Repeat now adding in the 4th cup of flour.
Stir in ½ cup flour and move to a lightly floured surface.
Knead dough on a lightly floured surface for 7-8 minutes. (see notes)
The way to test if its ready, is to lightly press into the dough with 2 fingers and it should spring back.
Let rest for 10 mins covered with a towel.