In a bowl, combine chopped dates and the hot coffee.
Stir in baking soda and let it sit for 10–15 minutes.
In a separate bowl, whisk together the flour, salt, and baking powder. Set aside.
In a large mixing bowl, cream the butter and brown sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
Pour in the date-coffee mixture and stir until well combined.
Fold in the dry ingredients just until incorporated. Do not overmix.
Preheat your oven to 175°C (350°F).
Grease and line a loaf pan (8x4 inch or similar).
Pour the batter into the pan and smooth the top.
Bake for 28-30 minutes, or until a toothpick inserted in the center comes out clean.
Cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
For the toffee sauce, in a small saucepan, melt butter over medium heat.
Add brown sugar, cream, vanilla extract, and a pinch of salt.
Let it simmer for 2–3 minutes until slightly thickened.
Drizzle over individual slices when serving.