How did I make the perfect donuts?

Fluffy donuts Ingredients: 2 cups milk; 1 tsp dry yeast; 2 tbsp sugar; 2 egg yolks; 2 cups white flour; 1 tbsp salt; 2 sachets vanilla sugar; 1 tsp lemon essence; Oil for frying; Powdered sugar Chocolate spread or jam . Step 1: Put warm milk, yeast and sugar in a large bowl. Step 2: Mix with a whisk to dissolve the ingredients. Step 3: Cover the bowl with cling film and let the yeast activate for 10 minutes. Step 4: Remove the foil and mix Step 5: Add the yolks and stir a little more. Step 6: Put flour, salt, vanilla sugar and lemon essence in the bowl. Step 7: Knead until you get a fluffy, elastic, slightly sticky dough.