Combine 2 cups flour, yeast, sugar and salt in a medium mixing bowl. Combine butter and milk and heat to a temperature of 120ºF - 130ºF. Add to dry ingredients, mixing thoroughly. Add egg; mix well. Add enough of remaining flour to make a soft dough that is not sticky when handled. Lightly grease a medium mixing bowl. Place dough in bowl and roll around so that it is lightly covered with grease. Place bowl with dough in a warm place until it has doubled in size. Meanwhile, combine remaining ingredients, except powdered sugar and water, in a medium mixing bowl. Punch down dough and place on a cookie sheet. Flatten dough into a 10-inch circle. Spread topping over dough, leaving an inch all around. Place in a warm place until dough has doubled in size. Preheat oven to 350ºF. Bake for approximately 30 minutes or until crust is golden brown. Combine powdered sugar and water in a small mixing bowl to make glaze. Cool wheel completely and drizzle with glaze. Makes 1 10-inch wheel.