Step 1

Preheat oven to 350°F. Lightly grease a 12-cup muffin pan with cooking spray and set aside.

Step 2

In a large bowl, whisk together the flour, oats, baking powder, baking soda, salt and cinnamon.

Step 3

In a medium bowl, whisk together the oil, brown sugar, eggs, vanilla and Greek yogurt. Stir the wet ingredients into the dry ingredients until well combined. Fold in 1 cup chocolate chips.

Step 4

Divide batter evenly among greased muffins cups, filling each one almost full.

Step 5

In a small bowl, stir together the struesel ingredients with a fork until well coated in the oil. Place a heaping tablespoon of streusel over the batter in the muffin cups.

Step 6

Bake for 15-18 minutes or until muffins start to turn golden brown and streusel is crisp. Let muffins cool in pan for 5-10 minutes before removing to a wire rack to cool completely or enjoy.