01 -
In a mixing bowl, whisk together the egg, vegetable oil, sour cream, and vanilla extract until smooth.
02 -
Add granulated sugar to the wet mixture and stir until fully combined.
03 -
In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, and cornstarch.
04 -
Gradually add the dry ingredients into the wet ingredients, folding gently until just combined; avoid overmixing.
05 -
Fold in your choice of chocolate chips, sprinkles, lemon zest, or poppy seeds as preferred.
06 -
Grease a mini muffin pan or line with mini muffin liners to prevent sticking.
07 -
Using a small cookie scoop or spoon, evenly distribute batter into the prepared mini muffin cups.
08 -
Bake at 177°C (350°F) for 12-15 minutes or until a toothpick inserted in the center comes out clean.
09 -
Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.