Step 1

Add all of the streusel ingredients to a mixing bowl and stir well to combine.

Step 2

Set aside to dry out as you prepare the muffins.

Step 3

Preheat oven to 400 degrees. Line a 12 cup muffin tin with muffin liners.

Step 4

Add the flour, sugar, baking powder, cinnamon, and salt to a mixing bowl and stir to combine. Make a well in the center.

Step 5

Whisk together the egg, milk, oil, and vanilla in a small bowl. Pour the mixture into the well and stir together with a fork. Do not overmix. The batter should be a bit lumpy.

Step 6

Use a large cookie scoop to scoop the muffin batter into the prepared muffin tin. Sprinkle with the streusel.

Step 7

Bake for 25 minutes or until a tester comes out clean.

Step 8

Cool for 20 minutes before glazing.

Step 9

Whisk together the powdered sugar and cream, adding additional powdered sugar or cream to reach the consistency you prefer.

Step 10

Drizzle over the cooled muffins.