Start by cutting the fresh milk with the vinegar for about 3-5 minutes.
Place all the dry ingredients in a bowl. Add the sugar, egg, sour milk, and oil; then beat using a whisk until a uniform batter forms.
On the Instant Vortex panel, press Bake, then set time to 10 Minutes and temperature to 365°F (185°C). Press Start.
Place the batter in the pan, then carefully place in the basket. On the Instant Vortex control panel, press Bake, set time to 15 Minutes and temperature to 345°F(175°C). Press Start.
Finally, carefully take out the cupcakes. Decorate once they have cooled.