Peanut Butter Cookie Dough Milkshake

frozen large banana, as ripe as possible

tbsp peanut butter (or another nut butter or sun butter)

milk of choice (For a rich, “ice cream”-like shake, try using full-fat canned coconut milk. Use more or less milk, depending on desired thickness.)

pb cookie dough of choice (or try this recipe: healthy PB Cookie Dough Cookies.)

Optional: vanilla extract, a pinch of sea salt, chocolate syrup or cocoa powder