1. Preheat your oven to 375°F or 190°C.

2. Line a 12-cup muffin tin with paper liners to make removing the muffins a breeze.

3. In a large bowl, whisk together 250g or 2 3/4 cups of flour, 200g or 1 cup of sugar, and 6g or 1 1/2 teaspoons of baking powder.

4. In a separate bowl, whisk together 240ml or 1 cup of milk, 1 large egg, and 60g or 1/4 cup of melted butter.

5. Add 120g or 1 cup of chopped apple, 3g or 1/2 teaspoon of cinnamon, and 10g or 2 teaspoons of vanilla sugar to the wet ingredients and whisk until combined.

6. Pour the wet ingredients into the dry ingredients and stir until just combined – be careful not to overmix.

7. Divide the batter evenly among the muffin cups to ensure uniform baking.

8. Bake for 20-25 minutes, or until the muffins are golden brown and a toothpick inserted into the center of a muffin comes out clean.

9. Allow the muffins to cool in the tin for 5 minutes, then transfer them to a wire rack to cool completely.