1-First Step: Prepare the yeast mixture. Start by pouring the 200 milliliters of lukewarm milk into a large mixing bowl. Stir in the 10 grams of granulated sugar and sprinkle the 7 grams of active dry yeast over the top. Let it sit for about 5 to 10 minutes until the surface looks foamy. That foaming step tells you the yeast is active and ready to work. If the milk is too hot, it can damage the yeast, so aim for warm to the touch rather than steaming. This is also the best moment to gather your frying tools, like a deep skillet, a slotted spoon, and a plate lined with paper towels.

2-Second Step: Mix the dough. Add the 1 egg, 1 teaspoon vanilla extract, and 1 tablespoon melted butter to the yeast mixture. Whisk lightly until combined. In another bowl, mix the 250 grams of all-purpose flour with the 5 grams of salt, then pour the dry ingredients into the wet mixture. Stir with a spoon or spatula until the dough starts to come together. It will look a bit shaggy at first, which is normal. Keep mixing until no dry flour remains. If the dough feels very sticky, add a tiny dusting of flour, but do not overdo it. A soft dough gives Belgian croustillons their tender bite.

3-Third Step: Knead until smooth. Turn the dough onto a lightly floured surface and knead for about 6 to 8 minutes. You want the dough to feel smooth, elastic, and slightly tacky. If you are making this with kids or beginners, keep the kneading relaxed and simple. The dough does not need to be perfect, just workable and soft. For a more hands-off approach, you can knead with a stand mixer using a dough hook for about 4 to 5 minutes. Either way, the goal is a smooth ball that springs back lightly when pressed.

4-Fourth Step: Let the dough rise. Place the dough in a lightly greased bowl and cover it with a clean kitchen towel or plastic wrap. Let it rise in a warm spot for 1 to 1.5 hours, or until it has doubled in size. A gentle rise gives the fried dough balls a lighter texture after frying. If your kitchen is cool, place the bowl near a warm oven or inside a turned-off oven with the light on. Busy parents and students will appreciate that this is mostly waiting time, which gives you space to prep toppings, coffee, or a side fruit bowl.

5-Fifth Step: Shape the croustillons. Once the dough has risen, punch it down gently to release excess air. Divide it into small pieces and roll each piece into a ball, about the size of a walnut or slightly larger. Try to keep the sizes similar so they fry evenly. Place the shaped dough balls on a lightly floured tray or parchment-lined surface. Cover them loosely and let them rest for 15 to 20 minutes while the oil heats. This short rest helps them puff a little more in the fryer.

6-Sixth Step: Heat the oil. Pour enough vegetable oil into a deep pot or heavy skillet to give the dough balls room to float and move. Heat the oil to about 170 to 180 degrees Celsius, which is roughly 340 to 355 degrees Fahrenheit. If you do not have a thermometer, test with a tiny piece of dough. It should sizzle steadily and rise to the top without burning too fast. Be patient here. If the oil is too cool, the Belgian croustillons will absorb too much oil. If it is too hot, the outside will brown before the center cooks through. A steady medium heat gives the best result.

7-Seventh Step: Fry the dough balls. Carefully lower a few dough balls into the hot oil at a time, leaving room for them to puff and move. Fry for about 2 to 4 minutes per side, turning them often so they brown evenly. The finished croustillons should be golden, crisp, and lightly puffed. Use a slotted spoon to lift them out and place them on the paper towel-lined plate. Fry in small batches to keep the oil temperature steady. This is the part where the kitchen starts to smell amazing, and that warm, bakery-style aroma is half the fun.

8-Eighth Step: Dust and serve. While the Belgian croustillons fried dough balls are still warm, dust them generously with powdered sugar. Serve them right away for the best texture. They taste especially good with coffee, hot chocolate, or a simple fruit topping. For a fun breakfast spread, pair them with a bright side like easy blueberry muffins so guests can choose between fruity baked goods and warm fried treats. If you prefer a lighter drink alongside, a chilled smoothie from your favorite collection also works nicely.