Measure like you mean it. In a large bowl, combine oats, protein powder, chia or flax, and a pinch of salt. Stir to evenly distribute the dry ingredients.
Get sticky with it. Add nut butter, honey or maple syrup, and vanilla extract. Mix with a sturdy spoon or your hands if you're brave. If the mixture is too thick, add milk 1 tablespoon at a time.
Fold in the fun. Stir in dark chocolate chips and any optional add-ins. You're aiming for a thick, slightly tacky dough that holds together when pressed.
Roll the bites. Scoop about 1–2 tablespoons of dough per bite and roll into balls. You should get 16–20 bites depending on size. Consistency is key if you care about macros (which you do, right?).
Chill to set. Place bites on a parchment-lined tray and refrigerate for 20–30 minutes. This helps them firm up and makes them less sticky.
Store and conquer. Transfer to an airtight container for the week. Snack time = solved.