Just for a bit of fun on a Sunday afternoon, why not get creative with a biscuit? That's what I've been doing. Here are my efforts:
We tried chocolate spread and peanut butter mixed together. Then we tried peanut butter in the middle and chocolate spread on top. I preferred the first combo, but I'll leave you to make your own decision.
There's loads of room for creative experimentation, so try whatever you've got in your cupboards...