In a small saucepan over low heat, combine ½ cup Allulose (74g) and ¼ cup water (60 ml).
Heat until dissolved while stirring.
Bring to a simmer without stirring for about 15-20 minutes, until a light caramel color syrup emerges.
Quickly pour the syrup evenly among 6 ( 5-6 oz) ramekins and tilt in to spread the caramel across the bottom and around the sides of the ramekins.
To make Flan, first make the caramel. Combine sugar and water in a saucepan over medium heat.
Cook until the sugar dissolves and the mixture turns golden brown. Pour the caramel into a round baking dish.
In a separate mixing bowl, whisk together eggs, sweetened condensed milk, evaporated milk, and vanilla extract.
Place the dish in a larger pan filled with hot water and bake in a preheated 350F oven for about an hour.