Mix in the almond flour until well combined. Add 1 tbsp of milk as needed until the dough resembles a normal cookie dough consistency.Fold in the rainbow sprinkles.Cover and chill the cookie dough in the fridge.
In a large mixing bowl smooth out the mascarpone cheese. across the bottom of the bowl. Pour in the vanilla extract and salt. Mix to combine. Pour in the sweetened condensed milk. Stir well to fully combine.