Instructions

1. In a small bowl, combine the flour, sugar, baking powder, cinnamon and salt. In another bowl, mix the egg, milk, and oil. Add the dry ingredients into the wet ingredients and mix just until combined. Do not over mix!
2. For the streusel, combine the flour, cinnamon, sugar and walnuts together. Cut in the softened butter until you have a crumbly mix and the butter is all mixed in.
3. Line a muffin tin with liners and spoon a heaping tablespoon of batter into the bottom of each cup. Put a tablespoon of apple butter over top the batter. Then sprinkle some streusel topping over the apple butter. Distribute the remaining muffin batter over each of the muffin cups equally. Sprinkle the remaining streusel evenly over top the muffins.
4. Bake at 425 for 5 minutes, then reduce the oven temperature to 375 and cook for an additional 15 minutes. The muffins are done when a toothpick inserted into the center comes out clean.
5. Whisk the powdered sugar and apple cider together until smooth, then drizzle with a spoon over top the muffins.