Summarize the following:
Mix the muffin batter and spoon or pour it into the muffin tins. Then, remove the cream cheese from the fridge and dice it into 1⁄4 inch (0.64 cm) piece while it's still cold. Add a spoonful of diced cream cheese on top of each muffin cup and bake the muffins according the the recipe instructions. The cream cheese will sink into the batter while the muffins are baking. If you’re making muffins from scratch, cut the granulated white sugar from the recipe and use the same amount of brown sugar instead. Brown sugar is a little sweeter and imparts a rich, maple-like flavor to the muffins. You can also sprinkle cinnamon and brown sugar on top of the muffins before popping them in the oven to add a little crunchy sweetness.

Summary:
Upgrade any muffin recipe with cream cheese for a rich, decadent twist. Use brown sugar instead of white sugar for a sweeter, richer flavor.