Mima's Best Ever Cinnamon Rolls

In a mixing bowl, combine 2 1/4 C flour, sugar, salt, and yeast; add 1/2 C butter. With mixer at low speed, gradually pour 2 Cups of hot tap water into dry ingredients. Add egg; increase speed to medium and beat 2 minutes, remember to scrape bowl. Beat in 3/4 C flour and beat another 2 minutes. Stir in another 2 1/2 C of flour with a spoon to make a soft dough. Turn dough onto lightly floured surface and knead until smooth and elastic. This will take about 10 minutes. Shape dough into a ball and place in a greased large bowl, turning over so that the top of dough is greased. Cover with a towel and let dough rise in a warm place for an hour and half. Turn dough out onto a floured surface and punch down. Reform into a ball and cover with bowl and let rest for another 15 minutes. Toll out on a floured surface 1/2 " thick. Spread with melted butter and sprinkle cinammon filling. Roll up like a log pinching together edges as you roll. Use a string and cut 1" rolls from the "log". Place rolls in a pan that has 1/2 a cup of melted butter in it. Let rolls sit and rise again until double in size. Bake @ 425 degrees about 10-15 minutes until done. Cover with icing while rolls are still hot. Icing Mix butter and powdered sugar together in mixing bowl. Add vanilla. With the mixer going on low, slowly add milk until desired frosting consistency is reached. Ice rolls as soon as they are baked.