01 -
In a large mixing bowl, combine oats, chocolate chips, protein powder, and flaxseed (if using).
02 -
Add the peanut butter, honey (or maple syrup), and vanilla extract to the bowl.
03 -
Mix thoroughly using a sturdy spoon or your hands until the mixture is combined and sticky.
04 -
If the mixture is too dry, add water one teaspoon at a time until it holds together.
05 -
Scoop heaping tablespoons of the mixture and roll into balls using your hands.
06 -
Place the protein balls on a parchment-lined baking sheet or plate and refrigerate for at least 30 minutes to set.
07 -
Store in an airtight container in the refrigerator for up to 1 week.