Preheat oven to 400°F. Line a 12 cupcake pan with liners. (You can also grease the cupcake molds directly and pour batter in directly. They come out pretty easily. I tried both versions, but I like how they look in the muffin molds a little more.)
Mix 1 1/2 cups flour, sugar, salt and baking powder. Add in vegetable oil, egg and 1/3 cup milk into flour mixture and stir until batter is smooth. It will be sticky. Fold/stir in 3/4 cup shredded cheese and 1 cup macaroni and cheese. Make sure you use macaroni and cheese that is warm and loose and not cold and stuck together. If you are using leftovers from the fridge, make sure to warm it up first in the microwave. Fill muffin cups about 2/3 full.
Sprinkle additional 1 tsp of cheese on top of each muffin. Bake for about 18 minutes until knife inserted comes out clean.
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.