Step 1

Preheat oven to 180°C and grease a 6-hole muffin pan.

Step 2

Sift the flour into a medium bowl, then add a pinch of salt and the caster sugar. In a jug, combine the vegetable oil, egg, buttermilk and vanilla extract. Add to the dry mixture and stir to only just combine. Place a spoonful of the mixture in each muffin hole and make an indent in the centre. Fill each indent with a generous 1/2 teaspoon of strawberry jam. Cover the jam with the remaining muffin mixture and bake for 20 minutes. Remove from the oven and set aside to cool slightly.

Step 3

Meanwhile, melt the butter. Combine the extra sugar and the cinnamon in a large bowl. When the muffins are cool enough to handle, brush each muffin with the melted butter, then roll in the cinnamon sugar. Serve while still a little warm.