Place the dates and baking soda in a heat-proof bowl or measuring cup. Pour boiling water over and press the dates down with a spoon so they’re submerged. Let sit for 10 minutes.

In the mixing bowl, cream butter and sugar on high until light and fluffy, about 1 minute. Reduce speed to medium, add the egg and continue to mix until combined, scraping down the sides of the bowl as needed. With the mixer on low, add flour and baking powder and mix until just combined.

Preheat the oven to 350˚F (175˚C).

Puree the dates using a blender or immersion blender. Pour the mixture directly into the bowl of the stand mixer mix on low until well combined.

Grease and flour a 6-cup muffin tin. Divide the batter evenly between the prepared cavities and place in the oven. Bake for 17-19 minutes, until a toothpick inserted in the center comes out mostly clean. Allow the cakes to cool for about 5 minutes before turning out onto a plate or tray.

While the cakes are baking, make the Toffee Sauce: combine all ingredients (except bourbon) in a small saucepan. Bring to a boil, stirring occasionally to dissolve the sugar, and boil for 3 minutes until thickened. Remove from heat, stir in bourbon, and allow to cool slightly before spooning over the puddings. Serve immediately.