I made these from Nigella Lawson's book, How To Be A Domestic Goddess. They were super simple and turned out great. I would definitely recommend this recipe.
Dough:
4 cups flour
1/3 cup sugar
1/2 teaspoon salt
3 1/4-ounce packages of yeast
scant 1/2 cup butter
1 2/3 cup milk
2 eggs
Filling:
1/2 cup plus 2 tbsp butter
1/2 cup plus 2 tbsp sugar
1 1/2 teaspoons cinnamon
1 egg, beaten to glaze
Combine flour, sugar, salt and yeast. Melt butter and whisk it into the milk and eggs. Stir into the flour mixture. Mix until combined and then knead dough until smooth and springy. Let rise in oiled bowl (covered) for 25 minutes.
Roll one third of dough into a rectangle and place in bottom of pan. Roll remaining dough into a large rectangle and spread with the filling mixture. Roll up from the longest side and cut into 3/4" slices. Place them on top of the dough already in the pan and brush with egg wash. Let rise for 15 minutes.
Bake at 450 for 20 - 25 minutes.
The only change I made was to drizzle the tops with a little icing made with powdered sugar and milk.