Step 1

Add yeast to lukewarm milk; stir to combine. Allow to sit for about 10 minutes or until frothy.

Step 2

Whisk together flour, sugar and salt in a large bowl. Add milk/yeast mixture and egg. Beat with electric mixer on high until smooth, about 1 minute. (See Tip 3)

Step 3

Cover bowl with plastic wrap; let sit until bubbly and doubled in size, about 45 minutes.

Step 4

Heat Poffertjes pan on medium heat until hot, 3 to 4 minutes. Brush cavities with melted butter. Add about 1 tablespoon of batter to each of the cavities. When small bubbles start to appear and the top starts to look a bit dried out, quickly flip Poffertjes. (See Tips 4 and 5)

Step 5

Allow Poffertjes to cook on other side until nicely browned, about 2 minutes. Remove from pan. Repeat with remaining batter.

Step 6

Serve hot with a pat of butter and sprinkling of confectioners' sugar. Yield, about 60 Poffertjes.