Chocolate Peanut Butter Frozen Yogurt

Chocolate Peanut Butter Frozen Yogurt
1 cup plain Greek yogurt (not fat free)
1/4 cup smooth natural peanut butter
1/4 cup unsweetened cocoa powder
1/4 cup dates

Process all ingredients together in a food processor until smooth. If you have an ice cream maker, use it. If not, transfer it to a shallow container and stir every half hour or so. It could be eaten immediately, but it is really soft and more like chocolate yogurt. If frozen for just a few hours, it becomes like soft serve, and if frozen longer, much more solid (definitely keep it in a shallow container so it is easier to scoop). 
Optional flavoring add-ins: espresso powder, ground cinnamon, vanilla extract, honey, maple syrup.