Prepare the coffee cake topping by combining flour, brown sugar, granulated sugar, cinnamon, and cold butter. Cut the butter into the dry ingredients until a crumbly mixture forms.
In a separate bowl, whisk together flour, granulated sugar, baking powder, baking soda, and salt.
In another bowl, whisk together milk, eggs, vegetable oil, and vanilla extract.
Add the wet ingredients to the dry ingredients and mix until just combined. Do not overmix.
Gently fold in the leftover cranberry sauce.
Fill muffin cups about 2/3 full.
Sprinkle the coffee cake topping evenly over the muffins.
Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
Let the muffins cool in the muffin tin for a few minutes before transferring them to a wire rack to cool completely.