Step 1

Preheat oven to 350 degrees and spray a muffin pan with non-stick cooking spray.

Step 2

In a large mixing bowl combine sugar, oil, cinnamon, milk, egg, and vanilla extract and whisk until combined.

Step 3

Next, add 1/2 of the flour in with the wet ingredients, stir, and then add the other 1/2 and mix until just combined. DO NOT OVER MIX.

Step 4

Scoop out muffin batter evenly into a well-sprayed muffin pan using a medium cookie scoop. Fill each muffin tin about 2/3 full.

Step 5

Next prepare the streusel topping by combining brown sugar, cinnamon, and flour in a small mixing bowl. Once evenly combined, add in cold unsalted butter that was cut into small cubes.

Step 6

Use a fork or your hands to break up the butter into the mixture until a crumbly streusel mixture forms.

Step 7

Sprinkle the streusel evenly over the top of the muffin batter and gently press into the tops of each muffin.

Step 8

Bake in the oven for 9-12 minutes, or until the muffins are a light golden brown.

Step 9

Let your muffins cool for 5 minutes in the pan, before transferring to a cooling rack to cool for an additional 10 minutes.

Step 10

While muffins are cooling, prepare icing by combining powdered sugar and milk in a small bowl. Whisk together until smooth, and add additional milk if needed to reach desired drizzle consistency.

Step 11

Use a whisk or spoon and drizzle icing evenly on top of the muffins.

Step 12

Serve warm with a cup of coffee and enjoy!