The phrase "to add the sugar" means to mix or combine sugar with something else, such as a recipe for baking. It can also mean to include or incorporate something sweet into an already existing mixture or situation.
The consumption of added sugar in foods and beverages has been linked to obesity and type 2 diabetes. (fortune.com)
Our dried apples are of the highest quality and are packed with natural sweetness, so we saw no need to sweeten them with added sugar of any kind. (nuts.com)
Yes, there are challenges associated with finding, making, and eating real food without added sugars in our world of food products. (wowpowerwalking.com)