Preheat your oven to 350°F (175°C). Grease and line a cake pan with parchment paper.

In a bowl, soak the pitted Medjool dates in boiling milk or water along with the baking soda. Allow them to soak for 10 to 15 minutes until softened.

Once softened, blend the soaked dates into a smooth paste using a blender or food processor.

In a separate bowl, whisk together the dry ingredients: all-purpose flour, baking powder, cinnamon (if using), and salt.

In a large mixing bowl, cream together the butter and light brown sugar until light and fluffy. Then add the date paste, eggs, and vanilla extract, mixing until well combined.

Gradually mix the dry ingredients into the wet mixture, stirring until just combined.

Pour the batter into your prepared cake pan and bake for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean.

In a saucepan over medium heat, combine the butter, heavy cream, and light brown sugar. Bring to a boil while stirring.

Once boiling, remove from heat and stir in salt and vanilla extract.

When the cake is warm, poke holes in the top using a skewer or fork, then pour the sauce over the cake to soak in. Let it sit before serving.