Turn oven on to 400. Place butter in a 9x13" pan and place in the oven. It will melt as the oven is heating, just make sure you don’t burn it.
Meanwhile, crack the eggs into a blender. Beat for a few seconds. Add remaining ingredients and beat till smooth.
Remove pan from oven and tilt the pan so the melted butter covers the bottom and sides of the pan.
Pour the batter into the hot pan. Bake at 400° for about 25 minutes. The pancake will puff up, so make sure you leave enough space between the pan and oven rack above. The pancake will deflate as it cools.
Serve hot with syrup, powdered sugar, cinnamon sugar, or fruit.
Notes
-The original recipe calls for 1/2 cup butter. I cut it way back and I still think this tastes wonderful. You can add extra butter if you want, I won't stand in your way.