Step 1

Preheat the oven to 375 degrees and lightly grease a mini muffin pan with cooking spray. Set aside.

Step 2

In a large bowl, stir together the egg, oil, sour cream, vanilla, and sugar until smooth. Add the flour, cornstarch, baking powder, baking soda, and salt, stirring just until combined. Add in any mix-ins (see note below). Use a small cookie scoop to portion out dollops of batter, filling each compartment of the tin 3/4 of the way full. Bake in the preheated oven for 10 minutes or until a toothpick inserted comes out clean. Enjoy!

Step 3

For funfetti muffins: Add 3 tablespoons of rainbow sprinkles. Option to switch the vanilla extract out for clear vanilla extract instead! For chocolate chip mini muffins: Add 1/3 cup mini chocolate chips to the batter. Option to substitute melted butter for the oil or sub out the 1/2 cup sugar for 1/4 cup sugar and 1/4 cup brown sugar. For lemon poppyseed muffins: Add 1 teaspoon of lemon zest, 1 tablespoon lemon juice, and 2 teaspoons poppyseeds.