Steps
1. Preheat your oven to 180°C (350°F) and prepare the cupcake trays by lightly greasing them with oil.
2. In a mixing bowl, combine the eggs, sugar, and vinegar. Beat with an electric mixer until the mixture turns pale and fluffy.
3. Add the vegetable oil to the egg mixture and continue to mix until well combined.
4. Gradually add the warm milk and mix until the batter is smooth.
5. In a separate bowl, whisk together the flour, cornstarch, baking powder, and salt.
6. Slowly add the dry ingredients to the wet mixture, folding gently with a whisk until all the flour mixture is incorporated.
7. Fill each cupcake liner with 2/3 of the batter to allow room for rising.
8. Bake in the preheated oven for about 20 minutes or until a toothpick inserted in the center comes out clean.
9. Allow to cool before serving, and enjoy your delightful cupcakes!