This recipe teaches us how to make crème brûlée donuts with a tanghulu-like crunchy caramelized topping and a creamy homemade custard filling. The higher the water content of the dough, the fluffier the donuts will be, it will also help keep the donuts soft for a longer period of time. A good news is that you can totally knead this moist dough by hand – no stand mixer is needed for this recipe.