1-Follow these straightforward steps to create delicious peanut butter blueberry cookies that are simple yet rewarding. Start by preheating the oven to 350 degrees Fahrenheit and lining two baking sheets with parchment paper for easy cleanup and even baking. In a bowl, whisk together the peanut butter, brown sugar, milk, egg, and vanilla until the mixture is smooth and well combined.

2-Next, stir in the rolled oats, baking soda, salt, and cinnamon until everything is evenly mixed. Gently fold in the fresh blueberries or chocolate chips to keep their shape intact and add bursts of flavor. Chill the dough in the refrigerator for 15 to 30 minutes to make it easier to handle and help the cookies hold their form.

3-Scoop the dough gently onto the prepared baking sheets, pressing each portion down slightly to flatten. Bake for 10 to 12 minutes until the edges turn slightly crisp while the centers remain soft. Let the cookies cool on the baking sheets for about 10 minutes before moving them to a wire rack; if you like, drizzle with peanut butter for an extra touch before serving.