Preheat the oven to 425°F (218°C). Line a 4 jumbo(or 6 regular)cup muffin pan with cupcake liners
Sift together all dry ingredients in a bowl and whisk well.
Whisk together the all wet ingredients in a separate bowl.
Pour the wet ingredients into the dry ingredients and whisk until completely combined.
Add the blueberry, and fold in until just combined.
Pour the batter into the prepared pans to the top
Bake for 5 minutes at 425°F (218°C), then lower the heat to to 350°F (177°C)and bake for 15-18 minutes for regular 20-23 minutes for Jambo until a toothpick inserted into the centre comes out clean.
Transfer to cooling rack and allow the muffins to cool completely.