Mix all ingredients in a large bowl and let stand at room temperature for 15 minutes.
Melt butter in a pan over medium heat.
Angle pan and pour enough batter on one side to thinly and evenly cover the pan. Very quickly swirl the batter around to cover the pan in one thin layer.
Immediately use your cooking spatula to push down the thin edges of the crepe around the perimeter.
After about 1 minute (and once it is golden brown on the bottom) carefully flip it over without tearing the crepe.
Cook for 1 more minute on the other side (until it is golden brown as well) and then roll up each crepe.
Serve with your favorite optional topping(s).
Notes
Optional toppings: Nut butter (peanut, almond, sun butter), Greek yogurt, fruit (berries, banana)