Method

  1. Preheat the oven to 425°F (220°C). Prepare the baking tin by lining or greasing it.

  2. In a glass, combine the milk and vinegar. Let it sit for 10 minutes or until it curdles.

  3. In a mixing bowl, whisk together the melted butter and sugar until well combined.

  4. Add the eggs and whisk for 2-3 minutes or until pale in color.

  5. Add the milk mixture, vanilla extract, Greek yogurt, and oil. Mix until well combined.

  6. In a separate bowl, combine the dry ingredients: flour, baking powder, baking soda, salt, and chocolate chips.

  7. Pour the wet mixture into the dry ingredients and mix until just combined. Do not overmix the batter.

  8. Divide the batter evenly among the muffin cups.

  9. Bake for 5 minutes, then reduce the oven temperature to 375°F (190°C) without opening the oven door. Continue baking for an additional 13-15 minutes or until a toothpick inserted in the center comes out clean.

  10. Allow the muffins to cool in the tin for 5 minutes before transferring them to a wire rack to cool completely.