Christmas Muffins

0 Preheat oven to 400 degrees and grease a 12-cup muffin pan with nonstick cooking spray.
1 In a medium bowl, whisk together the flour, cornstarch, baking powder, baking soda, and salt. Set aside.
2 In a separate bowl, beat together the sugar, brown sugar, and oil until smooth and well combined. Add the eggs one at a time, beating between each addition.
3 Beat in the milk and vanilla.
4 Add the dry ingredients and mix until smooth.
5 Fold in the mini chocolate chips and sprinkles until well mixed.
6 Fill each cup of the muffin pan 2/3 of the way full. Sprinkle additional chocolate chips and sprinkles on top of each muffin, if desired.
7 Bake in the preheated oven for 18 to 20 minutes, until a toothpick inserted in the center comes out clean.
8 Allow to cool in the pan until safe to touch, then transfer the muffins to a wire cooling rack to cool completely before serving.