Stir the peanut butter. Make sure it’s smooth and fully mixed. If it’s stiff, microwave it for 10–15 seconds to loosen.
Mix the wet ingredients. In a large bowl, combine peanut butter, honey or maple syrup, vanilla, and 2 tablespoons of milk.
Stir until glossy and smooth.
Add the dry ingredients. Add protein powder, oats, cocoa powder, and salt. Fold together with a spatula. If using flax, chia, or crisp rice cereal, add them now.
Adjust texture. If the mixture is crumbly, add milk 1 tablespoon at a time until it holds together when pressed.
You want a soft, dough-like consistency that isn’t sticky.
Fold in chocolate chips. Stir in mini chocolate chips last so they don’t melt. Save a few to press on top for looks if you like.
Roll into bites. Scoop about 1 tablespoon of dough and roll into balls. Aim for 18–24 bites depending on size.
Lightly wet your hands if the dough sticks.
Chill to set. Place bites on a parchment-lined tray and refrigerate for 20–30 minutes. This helps them firm up and hold shape.
Serve or store. Enjoy right away or transfer to an airtight container for later.