Pulse the oats, dates, and peanut butter in a food processor, scraping down the sides as necessary.
Once the mixture starts to come together, add the milk, cinnamon or pumpkin spice, vanilla, and salt.
Pulse, then blend on low until the mixture comes together.
Roll the dough into 12 balls, then gently flatten into cookie shapes.
Drizzle with dark chocolate if you wish.
Store in a sealed container in the refrigerator.