Step-by-Step Instructions

1. 1.Combine Dry Ingredients

   In a mixing bowl, combine 1 cup of plain all-purpose flour, 1/3 cup of caster sugar (or super fine white sugar), 3/4 teaspoon of baking powder, and 3/4 teaspoon of baking soda (or bicarbonate of soda). Stir these dry ingredients together until well combined.

2. 2.Combine Wet Ingredients

   In a separate measuring cup or bowl, add 1/2 cup of low-fat vanilla yogurt, 1 egg, and 1 teaspoon of vanilla extract. Stir these wet ingredients together until they are combined.

3. 3.Mix Wet and Dry Ingredients

   Pour the combined wet ingredients into the bowl with the dry ingredients. Stir until just combined, being careful not to overmix.

4. 4.Fold in Blueberries

   Add 250 grams of blueberries to the batter. Gently fold everything together until the blueberries are nicely mixed into the batter.

5. 5.Prepare and Fill Donut Pan

   Lightly grease a donut pan with a little bit of spray-on oil. Transfer the blueberry batter into each of the donut holes, filling them about two-thirds full. Do not overfill.

6. 6.Bake the Donuts

   Place the filled donut pan into a preheated oven at 190°C (375°F). Bake for approximately 10 to 12 minutes, or until the donuts are golden brown.

7. 7.Cool and Serve

   Once baked, remove the donuts from the oven and allow them to sit in the tray for a few minutes. Then, transfer them onto a wire rack to cool. Optionally, sprinkle them with a little vanilla sugar while they are still hot. Serve warm or allow them to cool completely.