Beat yeast, water, sugar, salt, egg, and 2 c. flour until smooth.
Add oil and the other 2 c. flour. Mix well. Dough will be sticky.
Put in greased bowl and let rise.
Pat dough out on floured board until approx. 1/4 in. to 1/2 in. thick. Spread with butter. Sprinkle generously with sugar and cinnamon.
Roll jelly-roll fashion; seal side. Cut approx. 1 in. thick; put on greased baking pan or in greased muffin pans. Let rise.
Bake in 400 F oven for 12-15 minutes. Let cool slightly, then frost.