Heat a 9″ saute pan over medium heat.  Brush pan with oil and add a ladle (1/4 cup) of batter to the pan while swirling to evenly coat the bottom of the pan.  Flip once the edges of the crepe are slightly brown.  Cook for 10 seconds to set the batter on the other side.  

Repeat with the rest of the batter

Heat butter in a pan over medium heat.