1-First Step: Activate the yeast Start by dissolving 7 g of active dry yeast in 200 ml of lukewarm milk. Stir gently and let the mixture sit for 5 minutes until it turns foamy. This step matters because warm milk wakes up the yeast and gives your Belgian croustillons fried dough balls a light, airy texture. If the milk is too hot, it can damage the yeast, so aim for warm, not steaming.

2-Second Step: Build the batter In a large bowl, mix 250 g of all-purpose flour, 10 g of granulated sugar, and 5 g of salt. Make a well in the center, then add the yeast mixture, 1 egg, 1 teaspoon vanilla extract, and 1 tablespoon melted butter. Stir until smooth and slightly sticky. The batter should be thick enough to scoop, but loose enough to puff once it hits the oil.

3-Third Step: Let the batter rise Cover the bowl with a kitchen towel and place it in a warm spot for 45 minutes. During this resting time, the batter develops air pockets that help the fried dough balls become soft inside and crisp outside. If your kitchen is cool, set the bowl near a warm oven or inside an unheated oven with the light on. This small pause is what gives authentic Belgian croustillons their tender bite.

4-Fourth Step: Heat the oil properly Pour enough vegetable oil into a deep fryer or heavy pot for frying. Heat it to 180°C or 350°F. Use a thermometer if possible, because steady heat makes a big difference. If the oil is too cool, the dough balls absorb extra fat and become greasy. If it is too hot, the outside browns before the center cooks through.

5-Fifth Step: Fry in small batches Drop spoonfuls or small scoops of batter into the hot oil, working in batches so the pan does not get crowded. Small batches help the oil temperature stay steady, which is key for light, crisp Belgian croustillons fried dough balls. Fry for 3 to 4 minutes, turning occasionally, until they are puffed and evenly golden brown. A small scoop makes shaping easier, but two spoons work well too.

6-Sixth Step: Drain and coat Lift the cooked dough balls from the oil and place them on paper towels to drain. This helps remove excess oil and keeps the exterior crisp. While they are still warm, dust them generously with powdered sugar. The sugar clings best when the fried dough balls are fresh from the fryer, so do not wait too long before finishing them.

7-Seventh Step: Serve right away Belgian croustillons are at their best when served immediately. The outside stays crisp, the inside remains soft, and the powdered sugar melts just slightly into the warm crust. If you want a more indulgent serving style, offer chocolate sauce, caramel drizzle, or whipped cream on the side. For a fresh twist, pair them with berries or a scoop of vanilla ice cream.