Unfortunately, if you accidentally forgot to add sugar to your cake batter before putting it in the oven, the cake will likely not taste sweet. Sugar plays a crucial role in adding sweetness and flavor to baked goods. It also contributes to the texture and moisture of the final product.
Without sugar, the cake will lack the desired sweetness and may taste bland or less enjoyable. The absence of sugar can also affect the overall structure and texture of the cake, as sugar helps with moisture retention and provides tenderness.
If you realize the mistake before the cake is fully baked, you may have the option to remove it from the oven, carefully mix in the sugar, and then return it to the oven to finish baking. However, keep in mind that this may affect the texture and rise of the cake.
To salvage the situation, you could consider serving the unsweetened cake with sweet accompaniments such as a sugary glaze, syrup, frosting, or a dusting of powdered sugar. These additions can help enhance the sweetness and overall taste of the cake when served.