Preheat the oven at gas mark 6 (400 fahrenheit) 200 celsius.

In a bowl combine the butter and sugar. Mix until it forms a creamy paste. Next add the eggs and canola oil and whisk the ingredients. You can use a hand whisk or electric whisk.

Next add the flour, baking powder and salt. Use a sieve to help get any lumps out of the flour.

Grate the lemon to create your zest and use a juicer to extract the lemon juice.

Add the blueberries to your muffin batter followed by the lemon juice, lemon zest and vanilla extract.

Grease your muffin tray using margarine or butter. You can either place the batter directly into the muffin tray or use muffin cases.

Once the muffins are cooked they will be golden brown. Place your blueberry muffins on the cooling rack. They are now ready to serve.