01 -
Preheat oven to 170°C. Grease and flour a 23 cm loaf pan.
02 -
In a large mixing bowl, beat softened butter with sugar until pale and fluffy.
03 -
Add eggs one at a time, mixing well after each addition.
04 -
In a separate bowl, whisk together flour, baking powder, and salt.
05 -
In a jug, combine cream soda, dark rum (if using), vanilla extract, and butter extract.
06 -
Alternate adding dry ingredients and cream soda mixture to the butter mixture, beginning and ending with dry ingredients. Mix until just combined.
07 -
Pour batter evenly into prepared loaf pan and smooth the top.
08 -
Bake for 60–70 minutes, or until a skewer inserted in the centre comes out clean.
09 -
Let cake cool in pan for 15 minutes, then transfer to a wire rack to cool completely.
10 -
Warm the butterscotch sauce before serving and drizzle over each slice.