1. Gather Your Ingredients: Start by measuring out all your ingredients. This ensures you have everything on hand and makes the process smoother. Grab a large mixing bowl.

2. Combine Dry Ingredients: In the large mixing bowl, combine the rolled oats and protein powder. Stir them together with a spoon or spatula until they are well mixed and evenly distributed.

3. Add Wet Ingredients: Next, add the peanut butter, honey (or maple syrup), and milk to the bowl with the dry ingredients.

4. Mix Thoroughly: Using a sturdy spoon or your hands (which can be easier for thorough mixing), combine all the ingredients until a thick, uniform dough forms. It should be sticky but hold together when pressed. If it seems too dry, add a tiny bit more milk; if too wet, a touch more oats or protein powder.

5. Press Into Pan: Line an 8×8 inch baking dish or a small loaf pan with parchment paper, leaving an overhang on the sides to easily lift the bars out later. Transfer the mixture into the prepared pan and press it down firmly and evenly using the back of a spoon or your hands. Make sure the surface is smooth and compact.

6. Add Optional Toppings: If using mini chocolate chips or other toppings, sprinkle them over the pressed mixture and gently press them down so they adhere.

7. Chill to Set: Place the pan in the refrigerator for at least 30 minutes, or until the bars are firm enough to cut. This chilling time is essential for the bars to hold their shape.

8. Slice and Serve: Once chilled, use the parchment paper overhang to lift the entire slab out of the pan. Place it on a cutting board and cut into 10-12 even-sized bars. Serve immediately or store for later.