In a small bowl, warm the milk to a temperature between 90-100°F. Sprinkle the SAF Instant Yeast over the milk, allowing it to dissolve and activate for about 5 minutes until foamy.

In a large mixing bowl, whisk together the all-purpose flour, sugar, and salt until well combined. Make a well in the center to prepare for adding the wet ingredients.

Pour the activated yeast-milk mixture and the beaten egg into the well created in the dry ingredients. Mix gently until just combined, ensuring you don't overwork the batter.

Cover the mixing bowl with a clean kitchen towel or plastic wrap and let the batter rise at room temperature for at least 30 minutes.

Heat your Poffertjes or Aebleskiver pan over medium heat and generously grease each divot with unsalted butter.

Carefully fill each divot halfway with the batter. Cook for 1-2 minutes or until bubbles form on the surface; then flip each poffertje.

Transfer the poffertjes to a serving plate and serve warm with toppings.