According to Merriam-Webster, dessert is "a usually sweet course or dish (as of pastry or ice cream) usually served at the end of a meal." A granola bar, meanwhile, is defined as "a bar made of a mixture of oats and other ingredients (such as brown sugar, raisins, coconut, or nuts) that is eaten as a snack."
Is dessert the last dish?
We eat various foods throughout the day and we have numerous traditions about food, many of which go back thousands of years. But in American culture, one very strong tradition is that dessert, the sweetest portion of our food consumption, is the final thing eaten in the day.
Can dessert be dinner?
Adding a dessert to a full dinner will just add extra calories you don't need. However, when you don't eat the meal itself, you'll have room to have a sweet instead. For example, a typical full-course dinner might range somewhere from 500 to 1000 calories, but desserts range from about 80 calories to 350 calories.