These warm apple muffins, kissed with cinnamon-sugar, are the coziest breakfast to wake up to in the morning. Unlike dense, super-sweet muffins that taste more like dessert, these muffins are fluffy and just lightly sweetened, with chunks of tart apples that help balance everything out. Sit down to one with your morning coffee, or pack one up for breakfast on the go. Choose Your Apples Tart apples, such as Granny Smith, Honeycrisp, or Gala, are the best choice for these muffins. These kinds of apples lend tangy, juicy sweetness, which is the perfect counterpart to the moist and fluffy crumb. They also hold their shape well when baked, which means the chunks of fruit remain evenly scattered throughout the muffins. There’s no need to peel the apples for these muffins, as the skin will become tender in the oven. Skipping this step keeps prep time to a minimum, which means …