Pre-heat your oven to 160C Fan/325F/Gas Mark 3 and line a 9" square tin with baking paper
Mix the butter and sugar together until smooth and creamy
Mix in the vanilla
Mix in the plain flour and salt and form the mixture into a dough
Then press it into the bottom of the tin and bake for 15 minutes
For the caramel layer put the dates, almond milk, maple syrup and coconut oil into a pan and bring it to the boil, let it boil for 3 minutes
Take it off the heat and add the vanilla extract. Blend into a puree with a hand blender - be very careful as the mixture will be very hot! Smooth it on top of the biscuit base and put it back into the fridge
For the chocolate topping melt the dark chocolate then pour it on top of the caramel layer
Put it back in the fridge to set. Once fully set, remove from the tin and cut it into squares. Cut gently with a knife dipped in warm water to avoid the top from cracking