Cinnamon streusel muffins are a classic treat that everyone should have in their baking arsenal. They are the perfect combination of a soft and fluffy muffin base with a layer of cinnamon sugar goodness in the center of the muffin and a crunchy, sweet streusel topping.
Layer the muffin tin with muffin batter to the bottom of each muffin cup. IAdd the filling, then top with more muffin batter. Sprinkle muffin batter generously with crumb topping,