I used my Best Brownies in the World for this. You could use your own recipe, or even use store bought. No judging here.
Alternate recipe options if you don't have simple syrup:
You can also macerate the berries with orange juice and sugar.
Or you can macerate berries quite well with just sugar. If you leave them in sugar they soften naturally.
You could not bother macerating the berries at all and just toss them in fresh.
This recipe can be made in so many ways. If you can use any kind of berries, any kind of brownie or cake, or any kind of whipped cream. Parfaits are awesome because they are so easy to adapt to your own taste.