Process milk and eggs together in blender for 30 seconds.
Keep speed low, and slowly add flour and butter, processing just until blended.
Heat skillet over high heat until thoroughly heated.
Lightly grease a 7" skillet with non-stick cooking spray.
Pour scant 1/4 cup of batter onto heated skillet, picking up pan by the handle and tilting pan so the batter swirls over entire bottom of pan evenly.
Return pan to the heat.
Cook until bottom of crepe is turning golden, 1-2 minutes.
Gently loosen edges from skillet and flip to brown the other side.
Remove from skillet, and repeat process until you have cooked all crepes.