You can but I prefer using a cookie. I’ve experimented with this recipe a bit and found that the spread makes the oatmeal too sweet and too rich for my linking. Moreover, the spread is basically pureed cookies plus extra sugar and fat (not the healthiest fat, actually). I found that using a crushed cookie produced a healthier and less sweet version of the oatmeal. I did use 2 teaspoons of the spread on top. If you heat it up in the microwave for 20 seconds, it becomes runny, almost like a sauce and that tiny amount is just enough to produce an extra layer of Biscoff flavor without adding a ton of sugar and fat.