In a large bowl, mix together the flour, sugar, and salt.
In a separate bowl, mix together the milk, melted butter, egg, vanilla and orange peel.
Combine the wet ingredients with the dry ingredients and mix until well combined.
Stir in the yeast (use lukewarm milk), cover and let the batter rise in a warm place for about 45-60 minutes, until doubled in size.
Heat the Poffertjes pan / mini pancakes pan over medium heat and lightly grease each indentation with butter.
Fill each indentation with a small amount of batter and cook for 2-3 minutes on each side, or until golden brown.
Serve the Poffertjes hot with fruits and powdered sugar.