There are numerous variations of waffles due to the fact that waffles have been around since the medieval ages and continue to this day. Waffles prepared with yeast are the most popular variety, and Brussels waffles are the type most commonly made. Pearl sugar is used in the preparation of Liège waffles, which contributes to its intensely sugary flavor. Butter and eggs are used in the preparation of Flemish waffles, and fruit is typically served alongside them. Baking powder is typically used to prepare waffles in the United States, and syrup is the traditional topping. Belgian waffles are typically served with chocolate sauce and are created using yeast in the baking process. Buttermilk is used in the preparation of Bergische waffles, and fruit is typically served alongside them. Rice flour is used in the production of Hong Kong waffles, and traditional preparation calls for serving them with condensed milk. The leaves of the pandan plant are used to make waffles called pandan waffles, and coconut milk is the traditional topping for these waffles. Waffles from the Nordic countries are traditionally flavored with cardamom and served with a variety of berries. Waffles called stroop are made with syrup, and ice cream is typically served alongside them when they are served.