Blueberry muffins are a classic and delicious treat that are perfect for breakfast or as a snack. These muffins are moist, fluffy, and bursting with juicy blueberries. The batter is made with simple ingredients like flour, sugar, butter, and eggs, and is flavored with vanilla extract. The addition of blueberries adds a burst of sweetness and a pop of color to the muffins. These blueberry muffins are best enjoyed warm, straight out of the oven.