Preheat oven to 350°F. Line a 12-cup muffin pan with muffin liners.
Add flour, sugar, cinnamon, baking soda, tartar, and salt into a large bowl. Whisk together until evenly combined.
Add in oil, vanilla, vinegar, and water. Whisk until batter is smooth.
Divide batter evenly between the 12 muffin molds. Bake for about 18-22 minutes or until a toothpick inserted comes out clean.
While muffins are cooling, whisk together topping ingredients into a small bowl. Once the muffins are cooled, the surface should get a little moist and sticky. Once the surface is sticky, dip tops of muffins into the cinnamon sugar topping.
Notes
Please review the "Ingredient Notes" section in the post before making the muffins.
These muffins will rise barely over the edge of the muffin liners when they are finished baking (about the size of an unfrosted cupcake). If you wish for bigger muffins, you can make 8 instead of 12.
If the muffin tops are not sticky enough for the cinnamon sugar topping to stay on, you can lightly wet the muffin surfaces so that the cinnamon sugar topping sticks on better.
Estimated nutrition information does not include cinnamon sugar topping since it is difficult to determine how much of it is on each muffin.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.