Add all the ingredients in the order listed in a blender. Process on medium or medium-high speed until fully blended and smooth.
Preheat a griddle or frying pan over medium heat. Brush or rub liberally with butter. Heat until the butter is sizzling (but not burning).
Pour 1/4 cup batter (more or less) in rounds on the hot griddle. Cook for 1 to 2 minutes until the pancakes are set and small bubbles appear on the edges. Flip and continue to cook for another 1 to 2 minutes until cooked through.
Serve immediately with maple syrup, jam, or other desired pancake toppings.