01 -
In a mixing bowl, whisk together the egg, vegetable oil, sour cream, and vanilla extract until smooth and uniform.
02 -
Add granulated sugar to the wet mixture and stir thoroughly until fully integrated.
03 -
In a separate bowl, sift together the all-purpose flour, baking powder, baking soda, cornstarch, and salt.
04 -
Gradually add the dry ingredients to the wet ingredients, folding gently until just combined without overmixing.
05 -
Fold in your choice of chocolate chips, sprinkles, lemon zest, or poppy seeds to customize the flavor.
06 -
Using a small cookie scoop, evenly distribute the batter into a mini muffin pan prepared with nonstick spray or liners.
07 -
Bake in a preheated oven at 175 °C (350 °F) for 12-15 minutes, or until a toothpick inserted in the center comes out clean.
08 -
Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.